ps51e450 fuzzy static middle of the screen

[wreksta]

hi all any ideas what this is

I have removed back and checked lower buffers but there no water damage corrosion or anything

bad panel? hope not

[aaronwt6]

Re: ps51e450 fuzzy static middle of the screen

Knowing some of the history of this model and from my experience on a couple I've seen, I would unfortunately have to go with bad panel. Certainly wait for some more opinions but that's my 2 cents.

[tom66]

Re: ps51e450 fuzzy static middle of the screen

Definitely a bad panel. E series is pretty prone to such a fault. In general a lot of Samsung panels are bad these days, so I am very wary when picking them up.

[wreksta]

Re: ps51e450 fuzzy static middle of the screen

Why would it do it there mate I thought bad panel is horizontal lines ??

[flocko]

Re: ps51e450 fuzzy static middle of the screen

Horizontal lines = Y buffers Flocko

[wreksta]

Re: ps51e450 fuzzy static middle of the screen

Hi mate I know what horizontal lines mean lol

Any idea on my fault some lad on another forum said system ic. Which I doubt

[tw2005]

Re: ps51e450 fuzzy static middle of the screen

Why would it do it there mate I thought bad panel is horizontal lines ??

At the bottom there are buffer boards, i think known as e & f buffers in Samsung. The panel ribbons that connect to these have Ics embedded in the film. Not repairable, so this is known as a panel fault since the ribbon and those Ics are integral unlike the y buffers or e & f buffers.

With a noisy section like that I would say 100% panel and not the buffers. you could gamble on the buffer board but I think you will be disappointed.

It's a bugger but that's the way it is.

[tw2005]

Re: ps51e450 fuzzy static middle of the screen

Old example of what I suggesting but same principle

[tom66]

Re: ps51e450 fuzzy static middle of the screen

Usually horizontal and vertical lines are both panel issues - regardless of LCD or plasma tech.

Panel failures are rarer with plasmas, but they do happen...

[Alastair E]

Re: ps51e450 fuzzy static middle of the screen

those COF (Chip On Film) chips are a PITA!

Seen quite a few older Panasonic 42" with those gone and a few Samsung lately too....

These days, I wont spend out any sizable amount on ANY set--With 'Lines' on the display!

[tw2005]

Re: ps51e450 fuzzy static middle of the screen

those COF (Chip On Film) chips are a PITA!

Seen quite a few older Panasonic 42" with those gone and a few Samsung lately too....

These days, I wont spend out any sizable amount on ANY set--With 'Lines' on the display!

Just helped a guy with a TH-P50V20A, 2010 , 5081 SC failure. Got it going, total hours 3300, and he's had a single line for some time. bad luck there, mine has 10 000hrs and panel still good, hope it continues for some time yet.

[Alastair E]

Re: ps51e450 fuzzy static middle of the screen

I scrapped three 42PX60's in one day--with bad COF Chips! All those sets though probably had well over 15,000 hours on 'em. Still a shame though, sets were in great condition apart from the fault....
--Seems a common failure with that model.

[tom66]

Re: ps51e450 fuzzy static middle of the screen

Some early PX70s and PZ70Bs (before the "BA" designation) had that fault as well.
From what I've heard, it's a software bug - the control board in certain cases can have the Va remain live when the 5V shuts down, just for a second.
This can damage the COF chips eventually, if they go into an undesired "latch up" state.