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AM335x Starter Kit not wroking

I posted below Query few days back and also fillup hardware repair/return form also, but response, that why again posting  below query.

I have TMDSSK3358 - AM335x Starter Kit got in Dec 12 till last week it was working fine.

Last week while I was debuging on board suddenly Kit's LCD and LED goes off, I tried to power up again but fails

After three days when I was about to  thinking of returning this kit  to TI estore, I just check again. Connect power supply and switch on, starter kit power up normaly and work for some time  it went off again. And now whenever I switch on the only power LED glows for some time and goes off, no other LED or LCD blinks.

Can any one tell me what is wrong with kit