Samsung LN40R71BAX - No Video (Analog PC Signal) Troubleshooting

4 Troubleshooting
4-3
4-2-2 No Video (Analog PC Signal)
Check the PC source and
check the connection of
DSUB?
Input an analog PC signal.
check the connected cable.
Yes
Does the signal appear at
#R25, T25, T24, U24, V25,
V26(R,G,SOG,B,V,H) of
IC602?
Check JA306, PC cable.
Change the PC cable.
Change the main PCB Ass'y.
Yes
Power Indicator is off.
Lamp on, no video.
No
No
1
Does the digital data appear at
output of R916_FBE ~
R921FBE?
Check IC602.
Change the main PCB Ass'y.
Yes
Does the digital data appearat
output of R1001_FBE ~
R1017_FBE?
Check IC 901_FBE
Change the main PCB Ass'y.
Yes
No
No
2
3
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, call to Samsung Co. LTD
No