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Samsung PS42-E7HD help wanted re repair


Standard Member
A long shot I know but does anyone know what would cause the following fault:

After the set has been on for a while the picture quality deteriorates, becoming very fuzzy and grainy with a posterization llike quality to it. I'm assuming that it is temperature related obviously, but would anyone know exactly what component or board is at fault as I'm able to repair myself but diagnosis is the problem.

In an ideal world I would just buy a new tv of course, but finances are limited and if it is a relatively simple fix then I would like to give it a go.

The problem is not source related, definitely the tv. Thanks in anticipation.

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