Samsung LN32A550P3R, Руководство по обслуживанию

Страница: 29 / 164

4-3
4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check CN3009, PC cable.
Change the PC cable. Change the main
PCB assembly
No
Yes
Does the digital data appear at
output of RA5070~RA5075?
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the PC source and
check the connection of DSUB?
No
Input an analog PC signal.
Check the connected cable.
Yes
Check IC5004Change the main PCB
assembly
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at
#B9, #B10, #A11, #D12, #C11
(R,G,B,H,V) of IC5004?
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
1
2
3
Yes
Caution Make sure to disconnect the power before working on the SMPS / IP Board board.