No Power - Samsung UE32C5*** Service Manual

4. Troubleshooting

4-1-2. No Power

The LEDs on the front panel do not work when connecting the power cord.
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Symptom The SMPS relay does not work when connecting the power cord.
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The units appears to be dead.
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The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
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Major
checkpoints Check the fuses of each part.
-
Check the output voltage of SMPS.
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Replace the Main Board.
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Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-2
Lamp(Backlight) Off,
power indicator LED on?
Yes
Does proper Stand-By DC A5V
appear at TP - A5V?
Yes
Does proper Main DC B13V, B5V
appear at TP - B13V, B5V?
Yes
Does proper DC A3.3V
appear at TP - A3.3V?
Yes
Does proper B3.3V, B1.8V,
SPI_3.3V appear at BD216 (B3.3V),
BD212 (DDR B1.8V) TP - SPI_A3.3V ?
Yes
Does proper DC B13V
appear at LVDS connector
Pin #1~5 of T-con b'd?
Yes
Does proper DC B12V
appear at F1 of T-con b'd ?
Yes
A power is supplied to set?
No
Change 18p power cable.
No
No
Change the Main Assy.
No
No
No
Change the LVDS cable.
No
Change the T-con b'd.
(except for 4000 series)
Check a other function.
No
(No picture part)
Replace a LCD Panel.