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Samsung LE37R87BD

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downunder:
If, as you state, the set works fine for 1/2 hour, how do you infer the eeprom is corrupted. If it is corrupt, it stays that way until it is corrected by external intervention, such as a factory reset. You could go into the service menu and execute a reset in the opening page but I suspect it'll do bugger-all.
I didnt ask you to replace the t-con, but just to verify the ic is there and check if it reacts to cooling down.
At least then you will know it's cactus. No gut feelings in this. It is a common fault with t-cons.

sparkman001:
Downunder, please dont take this the wrong way, I dont doubt your expertise, we are all engineers trying to scatch a living, and unnesessary work or expenditure is something we can all do best to avoid, and Im gratefull for your input.
In the UK, as Kilroy has said he replaced the board, very often its cheaper, and faster to just replace the board. Simple economics. Ordering a special ic,postage/ handling, doing the SM rework is something I can do, but its time consuming and more often than not, not cost effective. It may be different where you live but here, everything depends on cost.
Regards
Bill   
   

downunder:
No offence meant, Sparkman, and I agree with your sentiments re cost of repairs. But the punters have very short pockets and to me a $2 chip beats $xx for a t-con. Price of boards is strangling us here.
Keep sparking on.

Kilroys:
Yes I have had one of these, but I cant remember if
it changed the value in the menu.
I hope you checked that it is not in "SHOP Mode"

markc:
For what it's worth: I don't think it's the eprom or the T-con. If the actual contrast value is changing then I would suspect micro. As sparkman001 says, can't see the T-con changing that value & as others have said, an eeproms content is fixed, until changed by something else!
Please post the solution if you find it.

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