Hitachi 42HDT52A Plasma. Woke up this morning and the TV had no power. I pushed the main power button and got the red "main power" to come on but can not get the TV to power up with any display. There is a green light that should come on with the picture. I can not get the green light to come on.

Main digital board fault. Check and replace the main digital board. Contact any service technician. If you wish to get more details visit the site linked here. http://electronicshelponline.blogspot.com/

Have you tried retuning the TV? You may need to do a Full Factory Reset tuning rather than just a rescan.

Rescan simply looks at the place holders where the old channels were stored and refreshes them. A Factory Reset (A.K.A. Shipping Condition) wipes the channel memories and starts again fresh.

Servicing by opening the back cover should be performed only by a qualified service technician.

First do you see a light indicating that the TV has power? There are two power buttons on the TV (the main power and the regular power button). The red standby light will light up when the main power switch is on. This indicator is just to the left of the remote I/R sensor. You can find the main switch on the bottom front of the tv (it is under the tv forward of the stand). Turn on the Main power if it is not on. Then try the power button on the control panel of the TV again.

Does the standby light change color or blink? (Red is standby, orange is power savings (no signal), blue is on.) If the main switch is on and the standby light doesn't come on, the TV has a problem at the power supply. Try unplugging the unit for a bit (at least 30 seconds) and then plugging it back in. This will reset the internal circuitry. If you see a blinking light, then the TV is reporting a self-test failure. I do not know the codes for this model Hitachi Plasma TV.

The manual for the Hitachi P50H401 TV is available from Retrevo: http://www.retrevo.com/support/Hitachi-P50H401-TVs-manual/id/1233ci869/t/2/ . You will need to enter a code to access the pdf.

I'm assuming you don't have one of the special versions that were intended for large audiences that were only controlled by remote (no control keys on the front of the TV). Remotes.com has the original remote or a substitute remote if you need it. See http://www.remotes.com/remotes/servlet/rs?a=gmi&uuid=13104063628240&smodel=P50H401&brand_pn=HITACHI_P50H401 .

I hope this helps.

Cindy Wells

unplug the unit for a while like one hour or so.

what kind of tv what size, projection,lcd,lcd, tube cant help if we dont know what your talking about whats the model number

try turning off main switch and unplug set then replug in wait 30 sec turn on main power and repeat then try if it works great if not power supply bad. i also suggest a ups universal power supply newer tvs sensitive to surges and brownouts also never turn tv off n on in short period of time will cause surge that trips protection circuit

unplug unit for 1 minute turn off main power button plug in then press main power button and try!

check the bulb it might have burned out

find and push the "reset button"