Samsung UA42EH5000R Service Manual page 50

4. Troubleshooting
No video (Video CVBS, COMPONENT)
„
Symptom
Audio is normal but no picture is displayed on the screen.
• Check the Video CVBS source and Component source.
Major
• This may happen when the LVDS cable connecting the Main Board and the Panel is
checkpoints
disconnected.
Diagnostics
Check the ident status of the input source?
4
5
Make sure to disconnect the power before working on the IP Board.
Caution
4-14
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the video source and check the
connection of video cable?
Yes
Check the Self Diagnosis (Support ⇢
Self Diagnosis ⇢ Picture Test) Dose the
promblem still exist self diagnosis?
Yes
(High : Ident, LOW : not Ident) TP-av1_ID,
TP-COMP1_ID
Yes
Does the input data appear at?
R806/R810(COMP1_Y/CVBS1)
R804(COMP1_PR)
R808(COMP2_PB)
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No Check a set in the 'Stand-by mode'.
No Input the video source properly.
Check external devices and
No
connections.
No
Check CN403.
Change the Main Ass'y.
No
No Please, Contact Tech support.