No Power - Samsung 2333HD Service Manual

4. Troubleshooting

4-2. No Power

Symptom Though the power swtich on, the LED power off and the screen is blank.
-
Check Power cable.
-
Check whether the Lamp connector is connected correctly to the IP.
Major -
checkpoints
Check whether the power cable is connected correctly to the MAIN.
-
Check whether the Function cable is connected correctly to the MAIN.
-
Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-2
C1070
IC1004
IC1010
C1105
LAMP off, power indicator
LED red color?
Yes
Does proper 5V appear
at BD1021.
Yes
Does proper DC14.5V appear
at C1070?
Yes
Does proper DC3.3V, 1.2v appear
at BD1014, C1105?
Yes
A power is supplied to set?
BD1014
Main Board Front
No
No
Change a Assy PCB Power.
No
Change a Assy PCB Power.
No
Check a other function.(No picture
No
Check a connection a
power cable.
Check IC1004, IC1010.
Change a main PBA.
part) Replace a lcd panel.