No Video (Analog Pc Signal) - Samsung LA32C550J1F Service Manual

4-1-3. No Video (Analog PC signal)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the PC source
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Major
Check the Arsenal, Check the Chelsea.
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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1
Diagnostics
2
Caution Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the PC source and
check the connection of D-SUB ?
Yes
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS, PC_VS
(R, G, B, H, V) ?
Yes
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK-,
O_TXCLK+, O_TXCLK-?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
Check a set in the 'Stand-by mode'
No
or 'DPMS mode'.
No
Input the analog PC signal properly.
Check CN902, PC cable.
No
Change the Main Assy.
Check IC1102 (SX1).
No
Change the Main Assy.
No
Please, Contact Tech support.
4. Troubleshooting
4-5