Troubles with my JVC AV-27530

I have a JVC AV-27530 and it keeps shutting off after a few minutes.I checked the manual for troubleshooting and it told me what to do for sleep mode. I did exactly what it said to do and it didn't work. Please help me.I know it isn't the self timer eithor and the only way you can turn the tv back on after this happens is to unplug it and plug it back in. It shuts off after 2 minutes.

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