Question about Samsung PCN5425R 54" Rear Projection Television

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Tv turns on and off by itself when plugged in

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It sounds like the power supply is bad. It is also possible that the main board is defective. The TV is most likely doing the following:
1. Trying to turn itself on
2. Unable to sustain the correct voltages
3. Puts itself in protection to avoid damaging the components by turning itself off
4. Repeat step 1

You can do a visual inspection for any bad capacitors that look bubbly first but would need the service manual and a voltmeter before finding out which part is needed. It is most likely the power supply not giving the correct voltages but the main board that is putting the TV into protect. The voltages need to be checked in order to see which one needs to be fixed.

Posted on Oct 06, 2009

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Posted on Jan 02, 2017

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