Shut On/off by Itself

[ineedhelp]

I have a Sansung DLP TV and bought it about 4 years ago.
For the past year or so, I have been having issues with it. The unit will shut itself off and about 30 seconds later, turn itself back on. The sound will shut off first, and the picture will remain, then the picture will freeze, then the unit will completely shut itself off then turn itself back on again. Sometimes this happens every minute or so, and sometimes it will go hours without doing it.
I've tried putting a fan on the back of the TV incase it was an over heating problem, but that didn't seem to help. I've also sent it in to the warranty company several times and they say they can't reproduce the problem, so they say they cannot fix it.
This is very frustrating, Does anyone have any ideas or have the same problem!?

[Angel]

I think your problem could be the DMD board. It doesn't sound like anything else.