Samsung UA40B7000WM Service Manual page 44

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 IC7001(chelsea)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Caution Make sure to disconnect the power before working on the IP board.
COMP SOUND COMP SOUND
Diagnostics
1
2
4-10
COMPONENT COMPONENT
AUDIO AUDIO
No video
Yes
Check the PC source and
check the connection of DSUB?
Yes
Does the signal appear at pin1,2,3,13,14
(R,G,B,H,V) of CN3011?
Yes
Does the digital data appear
at output of IC6001?
Yes
Check the LVDS cable?
Replace the LCD panel?
HDMI2 HDMI2
HMDI1/DVI HMDI1/DVI
DVI/PC DVI/PC
SOUND IN SOUND IN
CN3011 CN3011
No
No
No
No
IC6001 IC6001
Input an analog PC signal.
Check the connected cable.
PC cable.
Change the PC cable. Change the main
PCB assembly
Change the IC6001 or the main PCB
assembly
Please, contact Tech support