I turn the power on and the light blinks thre

There only two possible prob.First change the power supply board,dosen't work,must change the main backlight video board,with the old power board?Don't work,than must change both new power supply board and the main backlight video board.Sometime both boards is dead require both that why u must buy both for troubleshoot,have backup board and ready to trouble and repair right away.U can will able to return board the that purcharse for 5% or 10% restocking fee later.