Absolutely no power on my Toshiba flatscreen lcd led tv. In a lighting storm we unplugged all of the appliances. This tv still was damaged because it was connected to the cable box via a hdmi cable. Not a single light comes on, fuses are good with no bulging capacitors. Dont know where to put probes from multimeter on power supply to test. Help!

If the HDMI cable was the only connection, then the high voltage pulse would have had to go through one or more of the video wires in the cable, through the video board, and back out the HDMI cable shielding. What troubles me is you should see the unit come up to standby and refuse to power on. That suggests there was something else connected besides the HDMI cable or the base made a decent ground. At least the panel is worth $150 or so (it is highly unlikely it was damaged).

This tv problems,the power supply board might be dead or not too?don't know yet.But the main tv Tuner signal board it is 100% dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish main Tuner signal board to do the replacement it first,becauce lighting storm have highvoltages go through the cable box to the tv.Probally have to call the cable company for a new replacement of the box too.After replaced the Tuner signal board,if still the same problems,the whole tv power supply have to replace too.The highvotages go through a circuit boards, it fries all major ICS and sesitive components already.