Dynex Dynex DX-PDP42-09 Plasma Fixed Itself?

[Gorrillasnot]

Hello,

I picked this non working TV up cheap at a yard sale. The guy said when plugged in there would be a couple clicking sounds and the standby light would come on, but the TV would not turn on.

I brought it home and took the back off. I plugged it in and heard a clicking noise and saw a green light flashing on a small board attached to the PSU board.
Pressing the power button did not do anything and the standby light was lit solid.

I had other things to do so I unplugged the TV until I had time to start measuring voltages.

Later that evening I got out my dmm and plugged the TV back in and started measuring the voltages, then pressed the power button and to my surprise the TV turned on and started working. All voltages that I could see printed next to the various connectors were right on.

Now I know TVs don't just magically fix themselves so I wonder what the original problem was? Maybe some weak caps?

The panel is a Samsung S42AX-YB09.
The psu board is PS-42 W3-STD.

Edit: Also, when the TV is on I can hear a buzzing noise that seems like it is coming from either the left side of the PSU or the y-main. It isn't very loud, but would probably be noticeable during quiet moments while watching a movie.

thanks

[Gorrillasnot]

Re: Dynex Dynex DX-PDP42-09 Plasma Fixed Itself?

bump

[Moreno83]

Re: Dynex Dynex DX-PDP42-09 Plasma Fixed Itself?

The "noise" can be a few loose screws causing vibration in the boards but it can be also the panel that you hear.

[SteveNielsen]

Re: Dynex Dynex DX-PDP42-09 Plasma Fixed Itself?

Bumping serves no real purpose here as the users likely to help you will anyway when they get the time to.

Could be a bad solder joint that got nudged while taking measurements.

[Gorrillasnot]

Re: Dynex Dynex DX-PDP42-09 Plasma Fixed Itself?

The noise sounds like an electronic buzzing, but i will check all the screws anyways.
Oddly enough I also have a 32" Philips LCD that buzzes from the psu board that I could never pinpoint the cause.

sorry for bumping..it's a force of habit from other forums I belong to where its the norm..I will take the PSU board off and see if there are any bad solder joints.

thanks