Question about Hitachi 42EDT41 42 in. HD-Ready Plasma Television

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Hitachi pd7200 42" plasma

Turned tv off on friday night, saturday morning switched tv on nothing happened, checked power supply to tv ok, no standby light on,
tv just 2 years old

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  • Anonymous Dec 30, 2007

    Tv now 2 years old, watched TV and switched channel, all went out. No channel signal, only thing is that red LED turns green when you switch power on or off. Unplugged an then re-plugged but nothing changed. Screen remains black, with no sound an even no channel number in upper right corner. Don't know what to do.



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Its a know fault with these sets - PDU's fail all time, look at avforums.co.uk

Posted on Mar 13, 2008

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  • 148 Answers

Unplug. leave off for a few minutes. small chance it will reset.
also, it might have lost its input setting and is no longer looking at the input you send the source signal to.
good luck
mark

Posted on Dec 28, 2007

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1 Answer

I put the tv on standby last night tried to switch on this morning and cannot get anything no lights etc any ideas?


i guess you burnt the power already or check the plug and change the fuse in the plug . see what happens

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My hitachi plasma 42 PD7800TA does not turn on ,not even the standby ,the fuse is fine ,dont know what else to do? thanks Tony.


Hello
The power regulator board in your Hitachi is not switching. It is an SMPS [Switched Mode Power Supply]. Normally for plasma TVs the power supply repair will be almost impossibele due to lack of component availability. If the fuse is OK, definitley the switching process has failed it it. There is an IC which oscillates at high frequency, whic its oscillation signals are given to MOSFET transistors to chop the incoming AC, converted DC voltage. These switched voltage is passed through SMPS transofrmers which it turn generates secondary voltages that goes to different circuit boards of your TV. The power board is the most important section in a Plasma TV. it must be perfect in every respect in terms of secondary voltages. If any one of this voltage goes over than specified, the main boar will get damaged. So it is adviced to replace it as card basis, rather than making "sugery" to it. The power supply board can be had from Authorised Hitachi Service centers. You just give the the exact model number of your Hitachi TV. They will give you the orginal power supply board. Never play experiments with Plasma TV. OK.

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1 Answer

I have a hitachi 50 "plasma that was given to me


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.

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did you check the fuse or relay for windows! if need be take out master switch and check for power. if power, then maybe the ground wire is bad. have a good day !!

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If you have a light on ( standby light ), then I would say power supply fault, tv could be shut down because of faulty capacitors in power supply. if you dont have any lights at all , check fuse in plug,
( there will almost certainly be a fuse in the tv) but, that is for a tv guy to fix.
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good luck

caypianan@yahoo.com

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