Samsung MO17P-E, MO17ES, MO172S Troubleshooting
CONFIDENTIAL
MO17P*/MO17E* 4-1
4 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC’s display as below.
• Resolution: 1280 x 1024
• H-frequency: 64 kHz
• V-frequency: 60 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: Stand PCB, Main PCB
• 14V develop but no screen: Main PCB
• 14V does not develop: Main PCB
4. If you push and hold the Exit for more than 5 seconds, the monitor automatically turns back
to the factory preset.
4-1 No Power
Does proper DC 14V
appear at DC jack and
Pin 39, 40, 41 of CN202?
Check signal cable and
power adaptor and CN202.
Yes
No
Does proper DC 5V, DC 3.3V
appear at Pin 2 of IC101,
and Pin 2 of IC103?
Check IC101, IC103
and related circuit.
Yes
No
Does proper DC 2.5V
appear at Pin 3 of IC104?
Check IC104
and related circuit.
Check IC301.
Yes
No
Yes
Does proper 5.0V
appear at Pin 5, 6 of IC105 and
Pin 7, 8 of IC105? (Pin 2 (*OFF_SW)
and Pin 4 (*PANEL_EN) of IC105
must be low level)
Check IC105, IC203
and related circuit.
No
CONFIDENTIAL
4 Troubleshooting
4-2 MO17P*/MO17E*
4-2-1 No Video [Analog]
Check signal cable and connection.
Check PC Signal.
No
No
No
Does the analog video signal appear at
R201, R202, R203? (RED, GREEN, BLUE)
Yes
Check R225, R224
and related circuit.
Check PC Signal.
Does the sync signal
appear at R225 and R224?
(A_H*V_SYNC, A_V_SYNC)
No
Check IC301 and related circuit.
No
Yes
Does the video signal
appear at the output port?
10 11
Does the video signal appear
at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of
IC401?
Yes
Is Pin 2(BKLT_EN) of IC203 High?
Check TFT-LCD panel and Inverter.
Yes
Replace IC301.
Yes
9 8 7 6
5
Check IC301 and related circuit.
No
Does the input signal appear at Pin 116, 117, 115 and 119 of
IC301 (DHS,DVS,DEN,DCLK)?
4 3 2
1
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