Toshiba 32AV504D shadows on sides of screen

[shaunbt123]

hi there i managed to get my tv to power on,but i have noticed there are shadows like dark stains on the left and right of the screen,that show up more on a white background.on dark scenes you cant see them.can someone please tell me what these are.i suspect a bad panel.but i hope im wrong.

[tom66]

Re: Toshiba 32AV504D shadows on sides of screen

Original fault? Did you take the panel apart? Backlight layers might need reseating/repositioning.

[shaunbt123]

Re: Toshiba 32AV504D shadows on sides of screen

sorry tom ,no the orignal fault was the set would not power on.i solved that and once the tv powered on this is what i saw on the screen.

[mu2]

Re: Toshiba 32AV504D shadows on sides of screen

I have a Vizio VO370M in which I replaced the main board.
It is showing a similar problem and I'm tempted to take apart the screen.
There seems to be a fair amount of discoloration on the metal on the back of the set where the boards are mounted.
I'm just wondering if it could be that the previous owner was a heavy smoker and the residue found it way between the layers? The tv doesn't seem to smell like smoke.
If I get ambitious this weekend I might take the screen apart and see if there are deposits on the plastic films.

Mike

[Alastair E]

Re: Toshiba 32AV504D shadows on sides of screen

The old ones and nicotine stained ones Ive seen the screen image on a B/W film are faded and tinged with yellow over the whole screen.
--I had a case of the backlight bulbs showing more yellow than they should have, as they had aged badly.
The sides were only slightly worse than the middle on that one....

You'll see it straight away if this is the case after the TFT has been lifted.

Only proper cure is to replace the backlight with an unfaded/stained one, although a good clean with metal-polish will remove a lot of crud.

Make sure you keep the diffuser-films exactly in order--And correctly face-up, right way round too!