No Video (Analog Pc) - Samsung 2333HD Service Manual

4. Troubleshooting

4-3. No Video (Analog PC)

Symptom Though the LED power turns on, the screen is blank when connecting the VGA cable.
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Even though the LED power turns on, the screen is blank when connecting the VGA cable.
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Check the D-sub cable connections.
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Major
checkpoints
Check whether the LVDS cable is connected correctly to the panel.
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Check whether the lamp connector of the panel is connected correctly to the IP board.
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Diagnostics
Check a PC source and check
the connection of DSUB cable?
① Does the sigmal appear at
Does the digital data appear at the
output of RA4000, RA4001?
Caution Make sure to disconnect the power before working on the IP board.
4-4
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IC4010
R802
R803
R807
Main Board Front
Power Indicator is off.
Lamp on, no video.
Yes
Yes
R802, R803, R807?
Yes
Yes
Check a LVDS cable?
Replace a lcd panel?
RA4000,RA4001
Input a analog PC signal and
No
connected cable(DPMS).
PC cable. Change a PC
No
cable. Change a main PCB ass'y.
Check IC4010.
No
Change a main PBA.
No
Please, Call to Samsung Co. LTD.