My Sylvania 6842 PEM Power will not stay on. I press the power button and the red stand-by light changes to green for about 2 seconds then reverts back to stand-by. There are not any code flashes from the stand-by light. Can anyone help me?

HD will only go down the HDMI (wide and skinny) port or component (red, blue, green) port.

your transformer on your power supply is bad, i would recomend replacing the power supply, usually when the transformer goes bad , it damages other things on the board, should be around a 200$ part

We found the blown capacitor on the main power board, bought a replacment for 40 cents, and replaced it. The monitor is working again.

If you are certain that the capacitor is OK, there could be a different problem on the main power board or even on the sub-power board. The sub-power board should have output voltages even if the main power board is defective.

You need to replace the burnt out capacitor - the little blue disk on the upper left side of the power circuit board. Here's a link to a replacement that works:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=490-4260-ND

Just solder the new one in and it should work fine. Mine works great with this replacement. Good luck

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=490-4260-ND

This RadioShack capacitor is no good - too low a voltage rating. Try replacing it with this one, or something with the same values:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=490-4260-ND

This fix worked for me. Best of luck

Most common problem is a ruptured capacitor on the main power pcb. It can be seen as ruptured if you know where to look. It has to be replaced with a special type of capacitor or it will quickly fail again. If its less than a year old it is still on parts warranty.

Something is breaking down. Possibly a specific ceramic capacitor on the main power pcb that has been troublesome. Usually there is just a loud pop and the screen goes dead. If the set is less than a year old it is still on parts warranty and the technician could just change circuit boards until the problem is gone.

Did you get your tv fixed? It may be the Sub power supply unit. If the main supply went out it would not light the display at all. Yes it is time for th repair shop. Good Luck.