Benq S52 Service Manual Trouble Shooting

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C4-425 Trouble Shooting Guide

99.K4501.001

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99.K4501.000-C4-425-001

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Page 1 of 35

JoybookS52 Trouble Shooting Guide

Form No: BQY0-0B-003-32(031205)

Product System (PS)

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C4-425 Trouble Shooting Guide

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99.K4501.000-C4-425-001

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Contents

1.1 Outline...........................................................................................................................5

1.2 Basic Flowchart............................................................................................................5

1.3 Power Supply..............................................................................................................10

Procedure 1 Power Icon Check...........................................................................10

Procedure 2 Connection Check...........................................................................12

Procedure 3 Battery Replacement Check ...........................................................12

Procedure 4 Replacement Check ........................................................................12

1.4 System Board..............................................................................................................13

Procedure 1 Port 80 Check (in Boot Mode) .......................................................13

Procedure 2 Port 80 Check (in Resume Mode) ..................................................17

Procedure 3 Test Program Check........................................................................18

Procedure 4 Replacement Check ........................................................................18

1.5 2.5-inch HDD..............................................................................................................19

Procedure 1 Message Check ...............................................................................19

Procedure 2 Partition Check .............................................................................20

Procedure 3 Format Check..................................................................................20

Procedure 4 Test Program Check........................................................................21

Procedure 5 Connector Check and Replacement Check.....................................21

1.6 Keyboard ....................................................................................................................23

Procedure 1 Test Program Check........................................................................23

Procedure 2 Connector Check and Replacement Check.....................................23

1.7 Display.........................................................................................................................24

Procedure 1 Test Program Check........................................................................24

Procedure 2 Connector Check and Replacement Check.....................................24

1.8 DVD-ROM Drive .......................................................................................................26

Procedure 1 DVD-ROM Cleaning Check...........................................................26

Procedure 2 Test Program Check........................................................................26

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Procedure 3 Connector Check and Replacement Check.....................................26

1.9 CD_ROM Drive ......................................................................................................28

Procedure 1 CD_ROM Cleaning Check .............................................................28

Procedure 2 Test Program Check........................................................................28

Procedure 3 Connector Check and Replacement Check.....................................28

1.10 Cooling Module ..........................................................................................................30

Procedure 1 Test Program Check........................................................................30

Procedure 2 Connector Check and Replacement Check.....................................30

1.11 Touch Pad ...................................................................................................................31

Procedure 1 Test Program Check

Procedure 2 Connector and FCC Check and Replacement Check

1.12 Audio ...........................................................................................................................32

Procedure 1 Test Program Check

Procedure 2 Connector Check and Replacement Check

1.13 IR .................................................................................................................................33

Procedure 1 Test Program Check

Procedure 2 Replacement Check

1.14 Battery life (Battery Learning).................................................................................34

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Figures

Figure 1-1 Basic flowchart (1/2) .........................................................................................7

Figure 1-2 Basic flowchart (2/2) .........................................................................................8

Tables

Table 1-1 Port 80 LED boot mode status (1/3) ................................................................14

Table 1-2 Port 80 LED resume mode status.....................................................................17

Table 1-3 HDD error code and status...................................................................................

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1.1 Outline

This chapter describes the fault diagnosis procedures for field replaceable units (FRUs) in the computer.

The FRUs covered here are as follows:

1. System board 2. 2.5-inch HDD 3. Keyboard

4. Display 5. DVD-ROM drive 6. CD_ROM drive

7. Cooling module 8. Touch Pad 10. Audio

11. IR 12. Battery life (Battery Learning)

See Tear Down guide for the procedures to replace FRUs and Diagnostic manual for the procedures to use

test programs

The following tools are required to perform the diagnostic procedures:

1. Diagnostics (maintenance test program) bootable CD

2. Screwdrivers

3. Cleaning disk kit (for ODD drive cleaning)

4. Port 80 card

5. Multi-meter

6. Headphone

7. Microphone

8. External FDD attachment

1.2 Basic Flowchart

The basic flowchart in Figure 2-1 serves as a guide for identifying a possibly faulty FRU.

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Before going through the diagnostic flowchart steps, verify the following:

 Ask the user if a password has been registered and, if so, ask him or her to enter the password. If

the user has forgotten the system password, use a jump wire to make a short circuit on pad 10 that’s near mini PCI slot, then turn the power on. When booted, the computer overrides password protection and automatically erases the current password. Please remove the short circuit on pad 10 when the password erased.

 Make sure the BenQ version of Windows® 2000, or XP has been installed on the HDD. Any

other operating system can cause the computer to malfunction.

 Make sure any piece of optional equipment has been installed.

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Start

Part No.:

Component Part.

No.:

Connect the AC

Adapter

Insert Bootable CD

into CD-ROM

Turn the Power on

and boot from CD

Power LED on ??

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Follow the power supply

diagnostic procedure in

section2.3

YES

Battery LED on ??

YES

Message

“BenQ”displayed??

YES

“Password=”

displayed

YES

OS start??

YES

Follow the power supply

diagnostic procedure in

section2.3

Follow the display diagnostic

procedure in section 2.4 &

2.7

See the previous page to

delete the password

Follow the HDD diagnostic

procedure in section 2.5

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Figure -1 Basic flowchart (1/2)

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Part No.:

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Diagnostic Program

loaded??

YES

Perform each test with

diagnostic program.

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Follow the CD-ROM diagnostic

Procedures in section 2.9

Identify the test resulting in the

Any error detected by the

diagnostic program??

YES

error and perform the

appropriate diagnostic

procedures

The system is

normal.

END

Figure -2 Basic flowchart (2/2)

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Page 9 of 35

If the diagnostic program cannot detect an error, the error may be intermittent. Run the continuous test program repeatedly to isolate the problem. Check the log utilities function to confirm which diagnostic test detected the error, then perform the appropriate troubleshooting procedures as follows:

1. If an error is detected by the System test, Memory test or Real Timer test, follow the system board troubleshooting procedures in Section 1.4.

2. If an error is detected by the Hard Disk test, follow the HDD troubleshooting procedures in Section 1.5.

3. If an error is detected by the Keyboard test, follow the keyboard troubleshooting procedures in Section 1.6.

4. If an error is detected by the Display test, follow the display troubleshooting procedures in Section

1.7.

5. If an error is detected by the DVD-ROM test, follow the DVD-ROM troubleshooting procedures in Section 1.8.

6. If an error is detected by the CD-ROM test, follow the CD-ROM troubleshooting procedures in Section 1.9.

7. If an error is detected by the Fan On/Off test, follow the cooling module troubleshooting procedures in Section 1.10

8. If an error is detected by the Touch Pad test, follow the Touch Pad troubleshooting procedures in Section 1.11

9. If an error is detected by the audio function test, follow the Audio function troubleshooting procedures in Section 1.12

10. If an error is detected by the IR test, follow the IR troubleshooting procedures in Section 1.13

11. If an error is detected by the Extending Battery life (Battery Learning), follow the Extending Battery life procedures in Section 1.14

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1.3 Power Supply

The power supply in the computer controls many functions and components. To check if the power supply

is defective or malfunctioning, follow the troubleshooting procedures below as instructed.

Procedure 1 Power Icon Check

Procedure 2 Connection Check

Procedure 3 Replacement Check

Procedure 1 Power Icon Check

The following two power LEDs indicate the power supply status:

 Battery LED

 Power LED

The power supply controller displays the power supply status through the Battery and Power LEDs as in

the tables below.

 Battery LED

Battery LED Power supply status

On in orange Battery being charged

Blinking in orange battery is abnormal

Blinking in blue Battery low while driving the computer *1

On in blue Battery is in use for system on

Off Battery fully charged, with AC adapter connected

*1: Battery power will run out in just a few minutes.

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 POWER LED

Power LED Power supply status

On in blue System fully on

On in orange System in suspend

Off System in power off

If power LED is on in blue, but nothing appear on screen. Please refer to section 2.4 System Board and section 2.7 Display for troubleshooting.

If the Power LED off while turn on the power, follow the steps below:

1. Remove the battery pack and the AC adapter to shut off power supply to the computer.

2. Attach the battery and AC adapter back and turn on the power again. If the LED still off, follow the steps below:

Check 1 Make sure the Power LED goes on in blue. If it does not, go to Procedure 2.

Check 2 Make sure the Battery LED goes on in blue without AC adapter. If it does not, go to

Procedure 4.

Check 3 Make sure the Battery LED goes on in orange when battery gauge is not full. If it does not,

go to Procedure 4.

Check 4 Make sure the Battery LED blinks in orange, go to Procedure 3.

Form No: BQY0-0B-003-32(031205)

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