37" hitachi plasma tv doesnt turn on

You should take it to a service. If the TV is a plasma it might be needed a refill or it could be an electrical issue.

The signal from the STU to the Hitachi box is going in the wrong direction.
Is the adaptor that you have switchable? If so, flick the switch in the
other direction and this will fix it. If the adaptor is not switchable get
one that is. Then set the STU output to RGB.

Hope this Helps. -CA

I have a 42in vizio led with about the same problem i replaced a 75 cent chip # u33 on computer board problem fixed.

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

Have you opened the actual TV and checked the power supply board inside? Because that is what it is. You need a new one.

These are the only manuals available. Maybe one of them will help.

Hitachi P60XR01U manual for Plasma TV

Hitachi P60XR01E manual for Plasma TV

Hitachi P60X901 manual for Plasma TV

Hitachi P55T551 manual for Plasma TV

Hitachi P55H4011 manual for Plasma TV

Hitachi P55H401 manual for Plasma TV

Hitachi P50XR01U manual for Plasma TV

Hitachi P50XR01E manual for Plasma TV

Hitachi P50X902 manual for Plasma TV

Hitachi P50X901 manual for Plasma TV

Hitachi P50V702 manual for Plasma TV

Hitachi P50V701 manual for Plasma TV

Hitachi P50TP01UA manual for Plasma TV

Hitachi P50TP01U manual for Plasma TV

Hitachi P50TP01EA manual for Plasma TV

Hitachi P50TP01E manual for Plasma TV

Hitachi P50T501A manual for Plasma TV

Hitachi P50T501 manual for Plasma TV

Hitachi P50T01UA manual for Plasma TV

Hitachi P50T01U manual for Plasma TV

Hitachi P50T01EA manual for Plasma TV

Hitachi P50T01E manual for Plasma TV

Hitachi P50S602 manual for Plasma TV

Hitachi P50S601 manual for Plasma TV

Hitachi P50H401A manual for Plasma TV

Hitachi P50H4011A manual for Plasma TV

Hitachi P50H4011 manual for Plasma TV

Hitachi P50H401 manual for Plasma TV

Hitachi P50A402 manual for Plasma TV

Hitachi P50A202 manual for Plasma TV

Hitachi P42TP01U manual for Plasma TV

Hitachi P42TP01E manual for Plasma TV

Hitachi P42T501A manual for Plasma TV

Hitachi P42T501 manual for Plasma TV

Hitachi P42T01UA manual for Plasma TV

Hitachi P42T01U manual for Plasma TV

Hitachi P42T01EA manual for Plasma TV

Hitachi P42T01E manual for Plasma TV

Hitachi P42H401A manual for Plasma TV

Hitachi P42H4011A manual for Plasma TV

Hitachi P42H4011 manual for Plasma TV

Hitachi P42H401 manual for Plasma TV

Hitachi P42H01U manual for Plasma TV

Hitachi P42H01E manual for Plasma TV

Hitachi P42A202 manual for Plasma TV

Hitachi P42A01 manual for Plasma TV

Hitachi CL42PD2100 manual for Plasma TV

Hitachi CL37PD2100 manual for Plasma TV

Hitachi CL32PD2100 manual for Plasma TV

Hitachi 70VX915 manual for Plasma TV

Go Setup in the menu. At the bottom you will see Reset The Software when power is turned off. Switch this to No.

flashing 4 times in 3 second

transistor problem