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4-6
4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
Check the SEMS03.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check JA4005_PC, PC cable.
Change the Main Assy
BN94-02709A
No
Yes
Does the digital data appear at
R8051 (HSYNC_OUT)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the PC source and
check the connection of D-SUB?
No
Input the analog
PC signal properly.
Yes
Check IC8003. Change the Main Assy
BN94-02709A
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support.
No
Does the signal appear at
R6037, R6034, R6035, R6032, R6023
(R, G, B, H, V) of IC6003?
1
2
No
Check a set in the
‘Stand-by mode’ or ‘DPMS mode’.
Caution
Make sure to disconnect the power before working on the IP board.
www.freeservicemanuals.info
11/8/15
Published in Heiloo, Holland.