Samsung LN23R71BAX Service Manual page 28

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