SONY XBR-65X850A Panel

[ljintexas]

Picked this one up for next to nothing..Owner was told that issue was display panel. Supposedly someone took it to a tech who replaced a board, said TV worked but new board was running hot so they faulted the panel. Going to open it up and check things out. More pics to come with some voltage measurements.

[ljintexas]

Re: SONY XBR-65X850A Panel

I have had several 40"+ Samsungs with this condition that was caused by bad gamma chip on t-con board..

[ReeceyBurger123]

Re: SONY XBR-65X850A Panel

Looks like an Led set which wouldnt use the As15, get us some pictures of the boards bud

[ljintexas]

Re: SONY XBR-65X850A Panel

WOW! What a T-con board!
If anyone replaced anything, it was the T-con. The foil on the sides has been removed and re stuck and there is adhesive residue on a harness where tape was removed and put back a half inch down the harness. Nothing else looks like it has been disturbed.
From what I gathered.."a board" (not the A board per say)was replaced but removed because of heating up while working. But the set worked with the new board..they faulted the panel.

Thanks for your time Reecey

[ReeceyBurger123]

Re: SONY XBR-65X850A Panel

Wow is that 4K ? Also heating the Tcon fixes it ?

[ljintexas]

Re: SONY XBR-65X850A Panel

Yes, it is an early 4K. What I was told was that a tech replaced one of the boards and the TV worked normally. They were concerned that whatever board was replaced was running too hot so supposedly, they reinstalled the old board and said the panel was bad. I do not know how much truth there is to that. I can tell you someone has removed the T-con from the way the foil tape on the cage that goes over it was re-installed.
My experience with 4K thus far has been one smps that was bad and one "enhancement board" which I think is called an A board? It was obvious on both where the source of the heat was.

Thanks Reecey

[ljintexas]

Re: SONY XBR-65X850A Panel

I ordered a T-con board as it was cheap..The main board seems to be made of unobtainium!

[ReeceyBurger123]

Re: SONY XBR-65X850A Panel

Yeah I would say replace the Tcon looks like one of the gamma reference drivers has failed causing the panel not to be driven correctly.

[ljintexas]

Re: SONY XBR-65X850A Panel

I will post results when parts arrive. Reecey, as always, I appreciate your input. Hard for me to believe a set of this caliber and age has a bad panel. Less than 3 yrs old, low usage, was in climate controlled storage for over 18 months. Previous owner stated that he had Best Buy (of all people) come and "calibrate" this set. Within 6 months it failed. May be no correlation, but just seems like a coincidence.

[ReeceyBurger123]

Re: SONY XBR-65X850A Panel

Its alright I just had a 52" Samsung 105 hours use and one of the ccfls failed will make thread. Keep us updated.

[ljintexas]

Re: SONY XBR-65X850A Panel

Thank You Sir

[ljintexas]

Re: SONY XBR-65X850A Panel

Replaced T-con with a module from Tristatemodule..Set is working normally. After 30 min. the larger ICs on the T-con were warm to the touch..not hot, but warm. Temp in my shop at the time was around 50F. Buttoned it up and ran it for several hours...no issues. Do those T-con ICs typically run warm?

Thanks

LJ