Support My HTC auto turn off

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http://androidforums.com – Hello Guys I'm new here. I had a problem with my HTC auto turn off every time i turn it on. The moment it display the desktop it just turn off by itself. Need help to fix this... I'm running the latest 4.0 version. But when i connect to a computer during the start up process every thing working just fine normally and it did not turn off. Please if anybody has a solution do share me. (General)