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lorac5 · May 12, 2011, 01:26 PM

Power light goes green TV comes on then loose picture and sound green light flashes then goes steady and picture and sound come back then green light flashes and I loose picture and sound just had a new lamp a couple of monthes ago

donf · May 12, 2011, 02:32 PM

Have you tested the receptacle to make sure it is not at fault?

It certainly sounds as if there is a power supply failure of some type.

I am going to ask that this thread be moved to the electronic forum as this forum deals primarily with residential electrical systems.

lorac5 · May 12, 2011, 02:43 PM

Yes steady 110vac

donf · May 12, 2011, 02:52 PM

Lora,

Are you sure it read 110AC? Voltage here in the U.S. is 120 or 240 for residential use?

I'm not trying to be a smart A**, but I am curious as to how you tested the voltage and how long did you keep the probes on the circuit?

Also, did you happen to measure the input to the power supply while the TV was operating or the output of the supply to the TV circuits?

Again, I am curious, do you happen to have a schematic of the TV?

lorac5 · May 16, 2011, 01:10 PM

I used a fluke dvm I do not have a schematic due you know if the board above the lamp assembly is a power supply and can I measure a voltage ac or dc

FadedMaster · May 19, 2011, 02:32 PM

The power supply is usually the board that the power from the wall first enters. Without a schematic it is difficult to know what readings you would need to take. Some of the readings will be printed on the board itself.

The issue you are having... does this happen every time?

So as I understand it, you try to power it on and get a picture with sound briefly, before the picture and sound drops out.

Without seeing the TV itself, it would be difficult to diagnose. Power cycling like it is, could be any number of things. When the light flashes, is it flashing any kind of error code? Also, most TVs have a few different lights on the front. Take note of which light it is.

After the TV shuts off, are you able to attempt to turn it back on? If not, does the light blink any kind of error code? And are you able to turn it back on after removing the power for a bit?