4-4
4. Troubleshooting
4-3. No Video (Analog PC)
Symptom Though the LED power turns on, the screen is blank when connecting the VGA cable.T
Major
checkpoints
Even though the LED power turns on, the screen is blank when connecting the VGA cable.
Check the D-sub cable connections.
Check whether the LVDS cable is connected correctly to the panel.
Check whether the lamp connector of the panel is connected correctly to the IP board.
T
T
T
T
Diagnostics
Main Board Front
RA5008
RA5009
RA5010
RA5011
RA5012
IC5002
R3020
R3021
R3022
Yes
No
Check a PC source and check
the connection of DSUB cable?
Input a analog PC signal and
connected cable(DPMS).
Yes
No
ⴘDoes the sigmal appear at
R3020, R3021,R3022?
PC cable. Change a PC
cable. Change a main PCB ass’y.
Yes
No
Does the digital data appear at the
output of RA5008~RA5012?
Check IC5002.
Change a main PBA.
No
Check a LVDS cable?
Replace a lcd panel?
Please, Call to Samsung Co. LTD.
Yes
Power Indicator is off.
Lamp on, no video.
Caution Make sure to disconnect the power before working on the IP board.
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