Hitachi 42 inch plasma tv shuts off by it self

Tries tv unplug,replug it back like about an hour later for the tv to do a resetting itself back to the factory setting.Go into the tv menu go to PICTURE to go down to do a resetting to the tv Tuner signal board.Tries scanning for channels again.The tv should be work again,if it still have the same result.The tv main board,the tv Tuner signal board is bad.Can u do some mechanicals work like take things aparts and putting it back together again?Yes?Try website like Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.

It sounds like a repair is required, but to confirm:

With this model, you can try unplugging from the wall for at least thirty seconds, then plug in and switch on. (That's if you haven't already).

If that doesn't work, there is a fault causing the power supply to self protect and shut down again. Repair will be needed.

Replace your buffer boards they are two unit located on the right of the plasma if you are looking the plasma from behind. Do you have any sound?

Thanks,

reset tv unplug one minute turn off main power plug in turn on main power try again, if not try different input and source ie dvd player or cable box

The Main digital board has problem, part# UX28023 (for P42H401, not P42H401A) , approx $170.

these particular tvs are very sensitive to voltage changes spikes etc.first turn off main power switch wait at least 30 sec if standby come on wait another 30 then turn off main power again and unplug tv for 1 min then plug in turn on main switch wait 30 sec then turn on tv with remote resets system.then buy a ups and always wait at least 30 min after turning tv off to turn back on if not causes power failure and after each press of power button wait 30 seconds before trying again lmk good luck

plasma tv units use a lot of power ,well into the hundreds of watts 9 some big screens use up to 800 watts to work)
I suggest that you consider a new led unit which uses barely any power and you will get a remote with it

MY TV KEPT GETTING WORSE EACH DAY ALSO. BUY A CAN OF SPRAY AIR WITH THE EXTENSION SPRAY TUBE. WHEN YOU GET THE TV RUNNING SPRAY THROUGH THE HOLES IN THE BACK RIGHT ONTO THE FAN BLADES OF BOTH FANS. THE DUST WILL FLY OFF THE BLADES. A VACUMM HOSE WILL HELP PULL OUT THE DUST. ALSO SRAY THE POWER SUPPLY BOARD FOR DUST. I APPEARS THE FANS SLOW DOWN WITH DIRT ON THEM AND THE EXTRA HEAT BUILD UP JUST AFTER THE TV IS SHUT DOWN IS CAUSING THE POWER SUPPLY TO BE IN A SHUT DOWN MODE WHEN POWERED UP THE NEXT TIME. BEEN TWO WEEKS NOW AND WORKS PERFECTLY NOW AGAIN.

TURN OFF THE MAINS AND THEN SWITCH IT BACK ON