Panasonic TC-P50ST50 5" vertical black bar

[tw2005]

Re: Panasonic TC-P50ST50 5" vertical black bar

Little does anyone know, I'm actually working for Panasonic trying to stop people buying Samsung and LG panels as replacements .

great, now i know where to get parts at cost

[stupidPanny]

Re: Panasonic TC-P50ST50 5" vertical black bar

So what step would you recommend next? And I haven't said it enough, thanks for all the help

[tw2005]

Re: Panasonic TC-P50ST50 5" vertical black bar

So what step would you recommend next? And I haven't said it enough, thanks for all the help

The million dollar question.

My gut tells me it's probably not A board. If i was working on this, double check all ribbons are seated correctly including the ones going to the C board in question. I'd inspect the contacts of the white ribbons in case there was corrosion or poor contact. Possibly with something non conductive flex the c board or apply pressure to the tiny 20 pin octal buffer ICs on that board, inspect them maybe for dud solder joints (magnifier), maybe warm them up or try freeze spray on them but not while it's running.

Try replacing the c board/s but for all I know it could be the panel but you said it was intermittently working at some stage. I would have expected failing ICs on the panel ribbons would be a more gradual decay of the picture with noisey lines not complete loss of data in one hit and it's not just one ribbon but 2 or 3 by what you have described.

For me that poses the question of the likelihood of all of those dying at the same time. I could understand that if a portion of the Octal buffer failed assuming that has something to do with the data sent to those ribbbons.

It's not an area of knowledge I posess but for what it's worth that's what i'm thinking.

Given the worth of the TV I would spend $30 for some C boards at the chance the panel is good, I could not justify an A board but I sent you a link for some real cheap bits.

at the end of the day you're not having to pay a workshop to diagnose this so you're already miles ahead $$ wise.

I know if this was mine in Australia I'd be challenging Panasonic to fix it out of wty if I had receipts and was the original purchaser.

Someone advanced with an oscilloscope may be able to prove whether the signals are actually being delivered to the panel ribbons. If they were mising at least it may be possible to trace back to where they disappear.

[stupidPanny]

Re: Panasonic TC-P50ST50 5" vertical black bar

Well I tried a set of replacement C boards. The problem was far worse (more sections not displaying), so I had the company send me another set with basically the same results.

Suggestions?