Samsung LN52A650 display problems

We bought this tv probably 5 years ago. Just in the last month or so, we would leave it on for a while while doing something else and Id notice the screen was black, but audio still on. Id need to restart the tv to get normal picture back. Then this week it will only last about 10 minutes before the screen turns black. I can tell when its about to happen because the screen will almost rotate a small amount, like its dropping, and I can see some white lines at the top, with a loss of picture quality, then turn black. It seems to be getting more frequent.

Any ideas?


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Clarification Request
Tell a little more.

It sounds heat related. Did you keep up with the maintenance? Such as a little canned air on the vents once a year?

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No, I definitely have not. Would there be perm damage?

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Sadly yes.

Heat accelerates the aging of all electronics today. You find this issue a lot with most gear and makers are loathe to advise cleaning because the first maker's sales would plummet as consumers would avoid a brand that told us to do this. You get the idea by now.

If this was mine, I'd get out the canned air and did the usual vent cleaning and hope it's just a dust bunny farm issue.

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