4-11
4. Troubleshooting
4-1-6. No Video (S-Video)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the S-Video source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check Side-AV
Change the main PCB ass’y or
Side-AV assembly
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the video source and
check the connection of
video cable?
No
Input a video signal.
Check the connected cable.
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the digital data appear at output
of RA5070~RA5075?
No
Check IC5004
Change the main PCB assembly
9
6
Does the signal appear
at R3204_NSIDE ~ R3206_NSIDE?
Yes
Does the digital data appear at output
of RA6074~RA6076, RA6078~RA6080,
R6082_P, R6083_P, R6086_P,
R6087_P?
No
Check IC6001_FBE
Change the main PCB assembly
7
Yes
Caution Make sure to disconnect the power before working on the SMPS / IP Board.
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