vizio plasma help? p50hdm

[mattstolte]

got this model and am trying to figure out what is going on. im thinking ysus?

[mattstolte]

Re: vizio plasma help? p50hdm

Anybody please

[nicholas1110]

Re: vizio plasma help? p50hdm

This is a very common buffer fault on these model. There is mosfets that short on the buffer board. If you search this forum you will find many others with the same fault.

[mattstolte]

Re: vizio plasma help? p50hdm

You talking about the buffer boards connected to the ysus?

[mattstolte]

Re: vizio plasma help? p50hdm

I checked the buffers they seem fine

[aaronwt6]

Re: vizio plasma help? p50hdm

I second the buffer opinion. And from the picture and personal experience, I'm guessing on the lower buffer. Double check the fets on that one. All three will show shorted because they are connected in parallel. You'll have to lift a leg on each to figure out which one it is.

[aaronwt6]

Re: vizio plasma help? p50hdm

You can also try disconnecting the jumper between the two buffers to start. Power up the TV with only the upper connected. If the lower is bad, you should get a picture on the top half of the screen.

[tom66]

Re: vizio plasma help? p50hdm

It is definitely a buffer fault and usually pretty easy to fix by replacing those six surface mounted FETs on the buffer board.
But don't delay as leaving it like this can eventually kill the IPM which is NOT an easy fix.

[mattstolte]

Re: vizio plasma help? p50hdm

tom can you show me how to test them i followed another link on coppeal tv repair blog on how to test the buffer boards and they seemed fine tested 2 ways