4-50
4. Troubleshooting
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 Arsenal, Check the Main Chipset.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Does the signal appear at
PIN - R, G, B, HS, VS (R, G, B, H, V) ?
Does the digital data appear at
TP-, E_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
or 'DPMS mode'
Input the analog PC signal properly.
Please, Contact Tech support.
Check CN401, PC cable.
Change the Main Assy.
Check IC1111 (X5).
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the PC source and
check the connection of D-SUB ?
Check the LVDS cable?
Replace the LCD panel?
1
2
Caution
Make sure to disconnect the power before working on the IP board.
www.freeservicemanuals.info
4/30/2017
Digitized in Heiloo Netherland
