Lenovo ideacentre AIO 520-27ICB F0DE00CJNY User manual

Name: Lenovo ideacentre AIO 520-27ICB F0DE00CJNY
Brand: Lenovo
SKU: 8228407
Rating: 4 (1 reviews)

4 (1)

ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Machine Types:F0D1 [AIO 520-24 IKL/Energy Star] F0D2 [AIO 520-24IKU/Energy Star] / F0D3 [AIO 520-24AST/Energy Star] F0D4 [AIO 520-22 IKL/Energy Star] / F0D5 [AIO 520-22IKU/Energy Star] F0D6 [AIO 520-22AST/Energy Star]

ideacentre All-In-One 520 (22 & 24 inch) Computer

Hardware Maintenance Manual

First Edition (July 2017)

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software are delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925

Contents

Chapter 1. About this manual . . . .	. .	1
Important Safety Information . . . . . . . .	. .	1
Chapter 2. Safety information . . . .	. .	3
General safety . . . . . . . . . . . . . .	. .	3
Electrical safety . . . . . . . . . . . . .	. .	3
Safety inspection guide . . . . . . . . . .	. .	5
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . .	. .	5
Grounding requirements . . . . . . . . . .	. .	6
Safety notices . . . . . . . . . . . . . .	. .	6
Chapter 3. General information . . .	. .	9
Specifications . . . . . . . . . . . . . .	. .	9
Chapter 4. General Checkout . . . .	.	11
Chapter 5. Using the Setup Utility. .	.	13
Starting the Lenovo BIOS Setup Utility program	.	13
Viewing and changing settings . . . . . . .	.	13
Using passwords. . . . . . . . . . . . .	.	13
Enabling or disabling a device . . . . . . .	.	15
Selecting a startup device . . . . . . . . .	.	16
Exiting the Lenovo BIOS Setup Utility program .	.	17
Chapter 6. Symptom-to-FRU Index .	.	19
Hard disk drive boot error . . . . . . . . .	.	19
Power Supply Problems . . . . . . . . . .	.	19
POST error codes . . . . . . . . . . . .	.	20
Undetermined problems . . . . . . . . . .	.	20

Chapter 7. Locating connectors,
controls and components . . . . . .	21
Chapter 8. Replacing hardware . . . .	31
General information. . . . . . . . . . . . .	31
Replacing the keyboard and mouse . . . . . .	32
Replacing the adapter . . . . . . . . . . . .	32
Removing the stand base . . . . . . . . . .	33
Removing the rear cover . . . . . . . . . . .	33
Replacing the camera . . . . . . . . . . . .	37
Replacing the heat-sink . . . . . . . . . . .	38
Replacing the CPU . . . . . . . . . . . . .	39
Replacing the hard disk drive . . . . . . . . .	42
Replacing the system fan . . . . . . . . . .	43
Replacing the optical drive . . . . . . . . . .	44
Replacing the memory module . . . . . . . .	45
Replacing the solid state drive . . . . . . . .	47
Replacing the Wi-Fi card. . . . . . . . . . .	47
Replacing the side USB board . . . . . . . .	48
Replacing the motherboard. . . . . . . . . .	49
Removing the stand holder . . . . . . . . . .	51
Replacing the Microphone module . . . . . . .	51
Replacing the speaker system . . . . . . . .	52
Replacing the LCD panel module . . . . . . .	53
Chapter 9. FRU lists . . . . . . . . . .	57

Chapter 10. General information . . 101

Additional Service Information . . . . . . . . 101

iii

iv ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 1. About this manual

This manual contains service and reference information for Lenovo All-In-One 520 series computers listed on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products.

Before servicing a Lenovo product, be sure to read the Safety Information.

The description of the TV-tuner card in this manual applies only to computers with a TV-tuner card installed. It does not apply to computers without a TV-tuner card.

Important Safety Information

Be sure to read all CAUTION and DANGER sections in this manual before following any of the instructions.

Veuillez lire toutes les consignes de type DANGER et ATTENTION du présent document avant d’exécuter les instructions.

Lesen Sie unbedingt alle Hinweise vom Typ “ACHTUNG” oder “VORSICHT” in dieser Dokumentation, bevor Sie irgendwelche Vorgänge durchführen

Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una qualsiasi delle istruzioni

Certifique-se de ler todas as instruções de cuidado e perigo neste manual antes de executar qualquer uma das instruções

Es importante que lea todas las declaraciones de precaución y de peligro de este manual antes de seguir las instrucciones.

2 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 2. Safety information

This chapter contains the safety information that you need to be familiar with before servicing a computer.

General safety

Follow these rules to ensure general safety:

•Keep the areas around the computer clear and clean during and after maintenance.

•When lifting any heavy object:

1.Ensure you can stand safely without slipping.

2.Distribute the weight of the object equally across both feet.

3.Lift slowly. Never move suddenly or twist when you attempt to lift.

4.Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back.

Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you.

•Do not perform any action that would create a hazard for the customer, or would make the computer unsafe.

•Before you start the computer, ensure that other service representatives and customer personnel are not in a position that would create a hazard for them.

•Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the computer.

•Keep your tool case away from areas that people may walk through to ensure no-one trips over it.

•Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves are fastened or rolled up above your elbows. If your hair is long, tie or fasten it back.

•Insert the ends of your necktie or scarf inside clothing or fasten it with a non-conductive clip, approximately 8 centimeters (3 inches) from the end.

•Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing. Remember: Metal objects are good electrical conductors.

•Wear safety glasses when you are: hammering, drilling soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

•After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

•Reattach all covers correctly before returning the computer to the customer.

Electrical safety

CAUTION:

Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect any attached power cords, telecommunication cables, network cables, and modem cables before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have rubber floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge.

•Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

•Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

•Disconnect all power before:

–Performing a mechanical inspection

–Working near power supplies

–Removing or installing Field Replaceable Units (FRUs)

•Before you start to work on the computer, unplug the power cord. If you cannot unplug it, ask the customer to power-off the electrical outlet that supplies power to the machine and to lock the electrical outlet in the off position.

•If you need to work on a computer that has exposed electrical circuits, observe the following precautions:

–Ensure that another person, familiar with the power-off controls, is near you. Remember: Another person must be there to switch off the power, if necessary.

–Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back.

Remember: There must be a complete circuit to cause electrical shock. By observing the above rule, you may prevent a current from passing through your body.

–When using a tester, set the controls correctly and use the approved probe leads and accessories for that tester.

–Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; these instructions are in the safety sections of the maintenance information. Use extreme care when measuring high voltages.

•Regularly inspect and maintain your electrical hand tools to ensure they are safe to use.

•Do not use worn or broken tools and testers.

•Never assume that power has been disconnected from a circuit. First, check that it has been powered off.

•Always look carefully for possible hazards in your work area. Examples of these hazards are wet floors, non-grounded power extension cables, conditions that may cause or allow power surges, and missing safety grounds.

•Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. This surface is conductive, and touching a live circuit can cause personal injury and damage to the computer.

•Do not service the following parts with the power on when they are removed from their normal operating positions in a computer:

–Power supply units

–Pumps

–Blowers and fans

–Motor generators

and similar units. (This practice ensures correct grounding of the units.)

•If an electrical accident occurs:

– Use caution; do not become a victim yourself.

4 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

–Switch off power.

–Send another person to get medical aid.

Safety inspection guide

The intent of this inspection guide is to assist you in identifying potential hazards posed by these products. Each computer, as it was designed and built, had required safety items installed to protect users and service personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide.

If any hazards are present, you must determine how serious the apparent hazard could be and whether you can continue without first resolving the problem.

Consider the following items and the safety hazards they present:

•Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock).

•Explosive hazards, such as a damaged CRT face or bulging capacitor

•Mechanical hazards, such as loose or missing hardware

The guide consists of a series of steps presented as a checklist. Begin the checks with the power off, and the power cord disconnected.

Checklist:

1.Check exterior covers for damage (loose, broken, or sharp edges).

2.Power-off the computer. Disconnect the power cord.

3.Check the power cord for:

a.A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and frame ground.

b.The power cord should be the appropriate type as specified in the parts listings.

c.Insulation must not be frayed or worn.

4.Remove the cover.

5.Check for any obvious alterations. Use good judgment as to the safety of any alterations.

6.Check inside the unit for any obvious hazards, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

7.Check for worn, frayed, or pinched cables.

8.Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Handling electrostatic discharge-sensitive devices

Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the computer, the part, the work mat, and the person handling the part are all at the same charge.

Notes:

1.Use product-specific ESD procedures when they exceed the requirements noted here.

2.Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts:

Chapter 2. Safety information 5

•Keep the parts in protective packages until they are inserted into the product.

•Avoid contact with other people while handling the part.

•Wear a grounded wrist strap against your skin to eliminate static on your body.

•Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap.

•Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially useful when handling ESD-sensitive devices.

•Select a grounding system, such as those listed below, to provide protection that meets the specific service requirement.

Note: The use of a grounding system is desirable but not required to protect against ESD damage.

–Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.

–Use an ESD common ground or reference point when working on a double-insulated or battery-operated system. You can use coax or connector-outside shells on these systems.

–Use the round ground-prong of the AC plug on AC-operated computers.

Grounding requirements

Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

Safety notices

The CAUTION and DANGER safety notices in this section are provided in the language of English.

DANGER

Electrical current from power, telephone and communication cables is hazardous.

To avoid a shock hazard:

•Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.

•Connect all power cords to a properly wired and grounded electrical outlet.

•Connect any equipment that will be attached to this product to a properly wired outlet.

•When possible, use one hand only to connect or disconnect signal cables.

•Never turn on any equipment when there is evidence of fire, water, or structural damage.

•Disconnect the attached power cords, telecommunications cables, network cables, and modem cables before you open the device covers, unless instructed otherwise in the installation and configuration procedures.

•Connect and disconnect cables as described in the following table when installing, moving, or opening covers on this product or attached devices.

6 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

To Connect		To Disconnect

1.	Turn everything OFF.	1.	Turn everything OFF.
2.	First, attach all cables to devices.	2.	First, remove power cords from outlets.
3.	Attach signal cables to connectors.	3.	Remove signal cables from connectors.
4.	Attach power cords to outlet.	4.	Remove all cables from devices.
5.	Turn device ON.

CAUTION:

When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.

Do not:

•Throw into or immerse in water

•Heat to more than 100°C (212°F)

•Repair or disassemble

Dispose of the battery as required by local ordinances or regulations.

CAUTION:

When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are installed, note the following:

•Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device.

•Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure.

DANGER

Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following:

These diodes emit radiation when open. Do not stare into the beam, do not view directly with optical instruments, and avoid direct exposure to the beam.

Chapter 2. Safety information 7


≥18 kg (37 lbs)	≥32 kg (70.5 lbs)	≥55 kg (121.2 lbs)

CAUTION:

Use safe practices when lifting.

CAUTION:

The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

2 1

CAUTION:

Do not place any object weighing more than 82 kg (180 lbs.) on top of rack-mounted devices.

8 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 3. General information

This chapter provides general information that applies to all computer models covered by this manual.

Specifications

This section lists the physical specifications for your computer.

Type Lenovo All-In-One 520

This section lists the physical specifications.

Environment

Air temperature:

Operating: 10° to 35°C

Transit: -20° to 55°C

Humidity:

Operating: 35% to 80%

Transit: 20% to 90% (40°C)

Altitude: 86KPa to 106KPa

Electrical input:

Input voltage: 90V-264V(AC)

Input frequency: 47Hz-63Hz

10 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 4. General Checkout

Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.

General error messages appear if a problem or conflict is found by an application, the operating system, or both. For an explanation of these messages, refer to the information supplied with that software package.

Use the following procedure to help determine the cause of the problem:

1.Power-off the computer and all external devices.

2.Check all cables and power cords.

3.Set all display controls to the middle position.

4.Power-on all external devices.

5.Power-on the computer.

•Look for displayed error codes.

•Look for readable instructions or a main menu on the display.

If you did not receive the correct response, proceed to step 6. If you did receive the correct response, proceed to step 7.

6.If one of the following happens, follow the instruction given:

•If the computer displays a POST error, go to “POST error codes”.

•If the computer hangs and no error is displayed, continue at step 7.

7.If the test stops and you cannot continue, replace the last device tested.

12 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 5. Using the Setup Utility

The Setup Utility program is used to view and change the configuration settings of your computer, regardless of which operating system you are using. However, the operating system settings might override any similar settings in the Setup Utility program.

Starting the Lenovo BIOS Setup Utility program

To start the Lenovo BIOS Setup Utility program, do the following:

1.If your computer is already on when you start this procedure, shut down the operating system and turn off the computer.

2.Press and hold the F1 key then turn on the computer. When the Lenovo BIOS Setup Utility program is displayed, release the F1 key.

Note: If a Power-On Password or an Administrator Password has been set, the Setup Utility program menu will not be displayed until you type your password. For more information, see “Using passwords.”

Viewing and changing settings

System configuration options are listed in the Lenovo BIOS Setup Utility program menu. To view or change settings, see “Starting the Setup Utility program.”

You must use the keyboard when using the Lenovo BIOS Setup Utility menu. The keys used to perform various tasks are displayed on the bottom of each screen.

Using passwords

You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons from gaining access to your computer and data. See “Starting the Setup Utility program.” The following types of passwords are available:

•Administrator Password

•Power-On Password

You do not have to set any passwords to use your computer. However, if you decide to set passwords, read the following sections.

Password considerations

A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For security reasons, it is a good idea to use a strong password that cannot be easily compromised. We suggest that passwords should follow these rules:

•For a strong password, use 7-16 characters and a mix of letters and numbers.

•Do not use your name or your user name.

•Do not use a common word or a common name.

•Use something significantly different from your previous password.

Attention: Administrator and Power-On passwords are not case sensitive.

Administrator Password

Setting an Administrator Password deters unauthorized persons from changing configuration settings. You might want to set an Administrator Password if you are responsible for maintaining the settings of several computers.

After you set an Administrator Password, a password prompt is displayed every time you access the Lenovo BIOS Setup Utility program.

If both the Administrator and Power-On Password are set, you can type either password. However, you must use your Administrator Password to change any configuration settings.

Setting, changing, or deleting an Administrator password

To set an Administrator Password, do the following:

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For more information, see “Password considerations” on page 13.

1.Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13).

2.From the Security menu, select Set Administrator Password and press the Enter key.

3.The password dialog box will be displayed. Type the password then press the Enter key.

4.Re-type the password to confirm, then press the Enter key. If you typed the password correctly, the password will be installed.

To change an Administrator Password, do the following:

1.Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13).

2.From the Security menu, select Set Administrator Password and press the Enter key.

3.The password dialog box will be displayed. Type the current password then press the Enter key.

4.Type the new password, then press the Enter key. Re-type the password to confirm the new password. If you typed the new password correctly, the new password will be installed. A Setup Noticed confirming that changes have been saved will be displayed.

To delete a previously set Administrator Password, do the following :

1.From the Security menu, select Set Administrator Password and press the Enter key.

2.The password dialog box will be displayed. Type the current password and press the Enter key.

3.To delete an Administrator Password, leave each new password line item blank, then press the Enter key. A Setup Notice confirming that changes have been saved will be displayed.

4.Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

5.Select Save changes and Exit from the menu.

Power-On Password

When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a valid password is typed from the keyboard.

Setting, changing, or deleting a Power-On Password

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9).

14 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

To set a Power-On Password, do the following:

1.Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on page 13.)

2.From the Security menu, select Set Power-On Password and press the Enter key.

3.The password dialog box will be displayed. Type the password, then press the Enter key.

4.Re-type the password to confirm. If you typed the password correctly, the password will be installed.

To change a Power-On Password, do the following:

1.Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on page 13.)

2.From the Security menu, select Set Power-On Password and press the Enter key.

3.The password dialog box will be displayed. Type the current password then press the Enter key.

To delete a previously set Power-On Password, do the following :

1.From the Security menu, select Set Power-On Password and press the Enter key.

2.The password dialog box will be displayed. Type the current password and press the Enter key.

3.To delete the Power-On Password, leave each new password line item blank, then press Enter. A Setup Notice confirming that changes have been saved will be displayed.

4.Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

5.Select Save changes and Exit from the menu.

Enabling or disabling a device

The Devices options is used to enable or disable user access to the following devices:

USB Functions	Select whether to enable or disable USB (Universal Serial
	Bus) functions. If the functions are disabled, no USB
	devices can be used.

SATA Mode	When this feature is set to Disabled, all devices
	connected to the SATA connectors (e.g. hard disk drives
	or the optical disk drive) are disabled and cannot be
	accessed.

Onboard Audio Controller	Select whether to enable or disable the Onboard
	Audio Controller. When this feature is set to Disabled
	all devices connected to the audio connectors (e.g.
	headphones or a microphone) are disabled and cannot
	be used.

Onboard Ethernet Controller or LAN Boot Agent	Select whether to enable or disable the Onboard Ethernet
	Controller, or select whether to enable or disable load
	onboard PXE (Preboot Execution Environment).

To enable or disable a device, do the following:

1.Start the Setup Utility program (see “Starting the Setup Utility program” on page 13).

2.From the Setup Utility program menu, select Devices.

3.Select an option as follows:

Select USB Setup, press the Enter key, then select USB Functions.

Chapter 5. Using the Setup Utility 15

Select ATA Device Setup, press the Enter key, then select SATA Mode.

Select Audio Setup, press the Enter key, then select Onboard Audio Controller.

Select Network Setup, press the Enter key, then select Onboard Ethernet Support or LAN Boot Agent.

4.Select Disabled or Enabled and press the Enter key.

5.Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

6.Select Save changes and Exit from the menu.

Notes:

a.If you do not want to save the settings, select Discard changes and Exit from the menu.

b.Select IDE/AHCI Mode: Device driver support is required for ACHI. Depending on how the hard disk image was installed, changing this setting may prevent the system from booting.

Selecting a startup device

If your computer does not boot from a device such as the CD/DVD-ROM drive disk or hard disk as expected, follow one of the procedures below.

Selecting a temporary startup device

Use this procedure to start up from any boot device.

Note: Not all CDs, DVDs or hard disk drives are bootable.

1.Turn off your computer.

2.Press and hold the F12 key then turn on the computer. When the Startup Device Menu appears, release the F12 key.

Note: If the Startup Device Menu does not display using these steps, repeatedly press and release the F12 key rather than keeping it pressed when turning on the computer.

3.Use ↑ and ↓ arrows to select the desired startup device from the Startup Device Menu and press the Enter key to begin.

Note: Selecting a startup device from the Startup Device Menu does not permanently change the startup sequence.

Selecting or changing the startup device sequence

To view or permanently change the configured startup device sequence, do the following:

1.Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13).

2.From the Lenovo BIOS Setup Utility program main menu, select the Startup option.

3.Press the Enter key, and select the devices for the Primary Boot Sequence. Read the information displayed on the right side of the screen.

4.Use - and ¯ arrows to select a device. Use the <+> or <-> keys to move a device up or down. Use the <×> key to exclude the device from or include the device in the boot sequence.

5.Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

6.Select Save changes and Exit from the menu.

Notes:

16 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

a.If you do not want to save the settings, select Discard changes and Exit from the menu.

b.If you have changed these settings and want to return to the default settings, select Load Optimal Defaults from the menu.

Exiting the Lenovo BIOS Setup Utility program

After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS Setup Utility program main menu. You might have to press the Esc key several times. Do one of the following:

•If you want to save the new settings, select Save changes and Exit from the menu. When the Save & reset window shows, select the Yes button, and then press the Enter key to exit the Lenovo BIOS Setup Utility program.

•If you do not want to save the settings, select Discard changes and Exit from the menu. When the Reset Without Saving window shows, select the Yes button, and then press the Enter key to exit the Lenovo BIOS Setup Utility program.

Chapter 5. Using the Setup Utility 17

18 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 6. Symptom-to-FRU Index

The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to “Undetermined problems” on page 20.

Notes:

•If you have both an error message and an incorrect audio response, diagnose the error message first.

•If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a POST error message, diagnose the POST error message first.

•If you did not receive any error message look for a description of your error symptoms in the first part of this index.

Hard disk drive boot error

A hard disk drive boot error can be caused by the following.

Error	FRU/Action

The startup drive is not included in the boot sequence	Check the configuration and ensure the startup drive is
configuration.	in the boot sequence.

No operating system is installed on the boot drive.	Install an operating system on the boot drive.

The boot sector on the startup drive is corrupted.	The drive must be formatted. Do the following:
	1. Attempt to back up the data on the failing hard disk
	drive.
	2. Use the operating system to format the hard disk
	drive.

The drive is defective.	Replace the hard disk drive.

Power Supply Problems

Follow these procedures if you suspect there is a power supply problem.

Check/Verify		FRU/Action

Check that the following are properly installed:		Reseat connectors
•	Power Cord
•	On/Off Switch connector
• System Board Power Supply connectors
•	Microprocessor connections

Check the power cord.		Power Cord

Check the power-on switch.		Power-on Switch

POST error codes

Each time you turn the computer on, it performs a series of tests to check that the system is operating correctly and that certain options are set. This series of tests is called the Power-On Self-Test, or POST. POST does the following:

•Checks some basic motherboard operations

•Checks that the memory is working correctly

•Starts video operations

•Verifies that the boot drive is working

POST Error Message	Description/Action

Keyboard error	Cannot initialize the keyboard. Make sure the keyboard
	is properly connected to the computer and that no keys
	are held pressed during POST. To purposely configure
	the computer without a keyboard, select Keyboardless
	operation in Startup and set the option to Enabled. The
	BIOS then ignores the missing keyboard during POST.

Reboot and Select proper Boot device or Insert Boot	The BIOS was unable to find a suitable boot device. Make
Media in selected Boot device	sure the boot drive is properly connected to the computer.
	Make sure you have bootable media in the boot device.

Undetermined problems

1.Power-off the computer.

2.Remove or disconnect the following components (if connected or installed) one at a time.

a.External devices (modem, printer, or mouse)

b.Extended video memory

c.External Cache

d.External Cache RAM

e.Hard disk drive

f.Disk drive

3.Power-on the computer to re-test the system.

4.Repeat steps 1 through 3 until you find the failing device or component.

If all devices and components have been removed and the problem continues, replace the system board.

20 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 7. Locating connectors, controls and components

This section provides illustrations to help locate the various connectors, controls and components of the computer.

Font view

The following illustration shows the location of controls and components on the front of the computer.

Attention: Be careful not to block any air vents on the computer. Blocked air vents can cause overheating.

1. Camera LED indicator

3. Built-in camera

2. Infrared LEDs Selected models only

Left and right view

The following illustration shows the location of connectors, controls and components on the left and right side of the computer.

1.	USB 3.0 connectors	3.	Power button

2.	Optical drive Optional	4.	Cable clip

22 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Rear view

The following illustration shows the location of connectors and components on the rear of the computer.

1.	Security cable slot	6.	USB 2.0 connector

2.	Power connector	7.	USB 2.0 connector

3.	Ethernet connector	8.	USB 2.0 connector

4.	HDMI-out connector	9.	HDMI-in connector (Optional)

5.	USB 2.0 connector	10. Air vent

Chapter 7. Locating connectors, controls and components 23

Lenovo ideacentre AIO 520-27ICB F0DE00CJNY User manual

Hardware components

The following illustration shows the components that make up your computer.

None touch model

1.	Stand holder	221. Power cord

2.	Stand base	23.	Hinge cover (top)

3.	Rear cover	24.	Hinge cover (bottom)

4.	HDD shielding	25.	Camera module

5.	HDD bracket	26.	Motherboard frame

6.	Hard disk drive	27.	System fan

7.	HDD cable	28.	Heatsink

8.	ODD cable	29.	Motherboard

9.	ODD bezel	30.	CPU

24 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

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