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4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the PC source
-
Major
Check the SEMS03.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
1
2
Caution
Make sure to disconnect the power before working on the IP board.
4-4
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
R6037, R6034, R6035, R6032, R6033
(R, G, B, H, V) of IC6003?
Yes
Does the digital data appear at
R8051 (HSYNC_OUT)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
Check a set in the
'Stand-by mode' or 'DPMS mode'.
Input the analog
No
PC signal properly.
No
Check JA4005, PC cable.
Change the Main Assy
No
Check CN8001_HD
Change the Main Assy
No
Please, Contact Tech support.
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