Question about BenQ PDP-46W1 46 in. HD-Ready Plasma Television

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Have a Hitachi 55hdt79...no pictures only sounds.

Just happen one day i turn on my plasma (Hit. 55hdt79) and there were no pictures only sounds. No menu or sound menu comes up, all black.
Anyone have the same problem ? Need help, want to try to fix it myself. Need help, Thanks!!!!

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It might be the power supply, check the main power supply. Audio power supply is seperate to main power supply, thats why you have a sound.

Posted on Jul 24, 2009

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In plasma if you have sound no picture
your y-sus board is defective

Posted on Mar 03, 2012

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1 Answer

What board would be needed to repair hitachi 55hdt79 lost picture sound ok?


Good one (great description).

Power-board...!

Those gum-wrapper capacitors they are using can snap when they croak.

Have fun save $$$$

(but take lots of detailed pictures BEFORE you start).

Jan 03, 2016 | Hitachi 55HDT79 55 in. Plasma HDTV

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Hitachi Plasma 55HDT79 volume gets louder


It's obviously beyond your expertise to repair it yourself. And it's not the sort of problem that can be diagnosed over the internet.
Find a trustworthy repair shop and take it there.

Sep 05, 2012 | Hitachi 55HDT79 55 in. Plasma HDTV

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No picture no menu (blank screen) sound works


Can't post a solution to this problem post. Need more details.

Apr 22, 2012 | Hitachi 55HDT79 55 in. Plasma HDTV

1 Answer

Hitachi 55HDT79 plasma television cycles on and off continuously. The blue led alternates between solid and blinking. The television seems to be in a continuous re-boot mode and does not stay on long...


i have a hitachi 55hdt79 that i purchased brand new some years ago and after only 1 year of use my girlfriend with her infinite wisdom threw something at me and as I dodged it the item hit and cracked the screen on the TV! I took it off the wall and boxed it up and has been sitting in my basement ever since. It still powers up and you can hear sound from it but for obvious reasons there is now image. If someone wants to make me an offer for it so they can use the parts to fix their own tv please let me know. email nutn2prv2u@yahoo.com it is located in Brooklyn NY 11223. you pay for shipping or I prefer you come pick it up. no reasonable offer refused.

Apr 19, 2011 | Hitachi 55HDT79 55 in. Plasma HDTV

1 Answer

Hitachi Plasma TV 55HDT79 that is turning on and off and back on


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

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1 Answer

55HT79 HITACHI BLUE POWER LIGHT BLINKS ON AND OFF.


I can't help you because after 26 months of ownership mine is doing the same thing (started on 7-12-09). Judging by the number of people with the same complaint I believe Hitachi knows that they have bad boards but refuses to replace them for customers unless they are within warranty. It also explains why the merchant that sold it to me in 2007 stopped offering Hitachi in 2008.

I'm disgusted because I'm anticipating a $300-$500 repair bill simply because Hitachi's design did not provide an external way of resetting it. Impossible to get to the menu to do a reset within 12 seconds before it starts the powering on booting cycle again.

Adding salt to the injury, mine is wall mounted and repair people will only work on it if it is readily accessilble when they walk in the door or if it is brought to the shop. Know what a 55" plasma TV weighs? Too much.

Jul 09, 2009 | Hitachi 55HDT79 55 in. Plasma HDTV

1 Answer

Hitachi PDP 55HDT79 got no picture


that power supply is a switch mode power supply,which means it looks for an input signal to turn on.
that signal comes from the main pc board.
if there is excessive current draw,it will shut down.
check the input,and the screen circuit it is driving

May 13, 2009 | BenQ PDP-46W1 46 in. HD-Ready Plasma...

1 Answer

Screen went black while watching, no sound


Almost for certain your power supply board is bad, Can be repaired at the component level only if you have some electronics savy! Good Luck!

Dec 26, 2008 | Hitachi 55HDT79 55 in. Plasma HDTV

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