Samsung PS50C96HD No Picture

[jasonr2000]

hi guys

ive got the above mentioned tv

and its got a damaged upper buffer board

and my guess is it have taken out the Y-main as well

as only one heatsink on there heats up instead of all 3

well anyway ive sourced a place that repairs the parts or exchanges them with good parts and offers a year warranty on them

the question is as follows

what caused the buffer board to go bad ??

is the panel shot ??

or was it just the Y-main went bad and took the buffer board with it


thanks for any help as im new to fixing TV's so have little knowledge on plasma repairs

thanks for any help

jason

[tom66]

Re: Samsung PS50C96HD No Picture

It's a common issue on these sets, for some reason the upper buffer board chip fails and takes the Y-main with it. Replace that and the Y-main usually fixes it. The temperature of the heatsinks is of no concern.

[jasonr2000]

Re: Samsung PS50C96HD No Picture

hi tom66


thanks for the reply

ill get the replacement parts today and give it a go

hopefully it will fix a good plasma *well I know its a little dated now but cant afford a new one this side of Christmas*

will post back my findings

[tom66]

Re: Samsung PS50C96HD No Picture

Don't expect the picture to blow you away, but it's not too bad (if the PS-42C96HD is anything to go on, a similar model.)

[jasonr2000]

Re: Samsung PS50C96HD No Picture

I don't tom66 if im honest


ive owned the thing since the start never had an issue with it so the picture quality to me will be no different

just need to get it working again

[jasonr2000]

Re: Samsung PS50C96HD No Picture

well tom66

got the boards and now all seems to be ok working with no issues

any ideas if a dodgy cap would cause the Y-main to go bad ??

ive found one so far that's buldging

was going to try and repair the Y-main and keep it as a spare

also ive attached some pics of the damaged buffer board

[Glitcher]

Re: Samsung PS50C96HD No Picture

Common problem with the Y-sustain board, A few MOSFETS under the bottom right heatsink has shorted. (Looking at the first photo) Looks like the TV must have been heavily used and for awhile (typically years?) causing that bad cap.

Usually replacing those shorted mosfets and the failed buffer IC will usually fix the problem. (some resistors near the mosfet could possibly be bad also but not so common).

[jasonr2000]

Re: Samsung PS50C96HD No Picture

hi glitcher thanks for the reply

the tv is a 2008 plasma so says it all really and its used for movies and gaming a lot so I guess that would make a lot of usage on there

ill check the mosfets under the bottom right heatsink and find the bad ones and try and get replacement if not ill just bin it as I picked up replacement boards today and all is well with the tv for now

[dhicks001]

Re: Samsung PS50C96HD No Picture

I'm in the same boat but a capacitor blew on the Power supply. Can't give you any more information than that. Is it likely that the power supply has killed other boards as well?

I was going to buy a replacement PSU but if there's a high risk of one of the other boards gone as well I don't think I'll bother.

Cheers!

[jasonr2000]

Re: Samsung PS50C96HD No Picture

hi dhicks001 if the psu has a bad capacitor its not likely it has taken out any other boards but if you can replace the capacitor normally fixes the problem and saves a bit of cash

[dhicks001]

Re: Samsung PS50C96HD No Picture

If one of you guys could also send me a schematic of the boards in the back so I know what board is what I would appreciate it. Thanks!

[selldoor]

Re: Samsung PS50C96HD No Picture

If you look at the boards they will have a part number - google that and it will tell you which board it is?