Sanyo Plasma DP70747 Powers Up No Sound Or Picture

[dbabyg]

My TV clicked and powered itself off. I turned the TV back on with the remote control. The front panel green light comes on, screen powers up but there is no picture or sound. Apparently, no menu showed up with the remote since there was no picture. I tried the side panel button but there was no difference. Next, I tried researching my options and possible advice on line. I removed the back cover and checked the boards but I did not find any burn spots or leaking capacitors. The sticker labels inside the TV states LG electronics, dated 2007-05. I found four fuses, checked them with a multimeter with zero reading results. Two fuses were located on Screen Panel 1, one on the Main Board and one on the Logic Board. I did not see a fuse on the Screen Panel 2 Board. Please advise if there are actually five fuses and where the last one may be located elsewhere. All of the boards inside are like computer boards with a couple screws holding it in place. I'm surprised they don't have a small fan to circulate fresh air and keep any heat source down. Any advice what to do next is appreciated.

[tom66]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

Pictures of the chassis would help us help you.

Also, is it DP50747?

What is the PDP model? This will be marked on one of the stickers marked with "LG Electronics".

[dbabyg]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

Sanyo Plasma DP70747.
PDP 50X41T000
Chassis is: P50747-01
Manufacturer Date: August 2007
Here are the chassis pictures;

[tom66]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

OK, it's really hard to see, but it looks like an LG plasma panel?

In which case, isolated the Z-sus, power up the set, see if you get a maldischarged picture (purple tint, partial panel discharge, looks foggy sometimes.)

Do you have a digital multimeter?

[dbabyg]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

I will upload another group of pictures that are lighter and easier to see tomorrow on Monday Feb 11.

When the TV is switched on (remote or side button) the power button on the front of the TV lights up and it remains green color. The screen powers up normal (flickers on) but no picture shows. The picture screen looks dark grey as if it is waiting for a picture to show up. When I turn the power off, the screen is black. Yes, I have a digital multimeter.

[tom66]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

Ah, so the panel is primed -- that is, in a dark room, you can see a slight glow?

[dbabyg]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

Yes, I can see a slight glow on the screen.
Here are several additional photos with much better lighting.

[tom66]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

If the panel is being primed, then the main board is most likely the fault. You say no sound -- have you tried flicking through sources with an audio and video source. Note most TVs won't play audio without a working video source.

[dbabyg]

Re: Sanyo Plasma DP70747 Powers Up No Sound Or Picture

I have tried flicking through audio and video sources but there is no change. Can the boards be tested with a Digital Multimeter to detect any faults? I have a multimeter.