My son has a Sony Bravia Model KDL-40S200. When he turns it on it displays a picture for about 2 seconds and goes into standby. Then the L.E.D. flashes 4 times. He called a local Sony service center and they want $120.00 just to look at it. Said it could be the vertical board. Does anyone have information to troubleshoot further and narrow it down more. I would hate to purchase a vertical board and not resolve the problem. Thanks!