Question about Hitachi P50H401 50 in. Plasma HDTV

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Hitachi p50H401 plasma - no picture no sound. blue led flashes

Was watching and a load pop noise then no picture or audio. blue led flashes four times and then repeats.

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Sound like mine,the two power clips have gone,midle panel to left,need to be replaced,if still no good,need new mother board with the clips.

Posted on Nov 25, 2011

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Posted on Jan 02, 2017

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I was watching my Hitachi 42hdm12 and heard a pop and now the picture won't show up or sound or anything?


A pop is usually a power surge and you blew a board. If you take the tv apart, if this is it, it will be evident by the burn marks. You could have burned out the internal power supply as well.

Oct 04, 2012 | Hitachi P50H401 50 in. Plasma HDTV

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My Hitachi P50H401 50 inch Plama TV stopped working last night, it was flashing thee blue light signal three times and repeating, had to unplug to stop that. Now, when plugged back in and the power is...


I had the exact same problem as some one else! We had the tv about 14 months, was coming do
wn the stairs and heard a loud pop. Now we have no audio or video and the blue power light is blinking 4 times which is supposed to be some kind of code, however when i called hitachi, they were not able to tell me what was wrong and as was said by the other person who had the same problem, conveniant for hitachi, the manufacturers warrenty had just ran out!! I will never buy another Hitachi product again!!!There seems to be a re-occuring problem here that requires a class action law suit!


I believe the power supply is bad. Will replace soon and try.

Dec 11, 2010 | Hitachi P50H401 50 in. Plasma HDTV

2 Answers

My 50 inch plasma hitachi went black while watching it and now all i have is a blue blinking light (3X's then 5 seconds and then again the blue light) no sound, no picture.


Tries to tv unplug,replug an hour later let the tv reset itself.See,if it work.Not the power supply board is dead.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Aug 19, 2010 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

My hitachi P50H401 will not turn on. No sound no


check your sdr boards. you can test them with a multi meter. they are known for going bad. what happens is the two caps by the output go bad on the power supply and they make the sdr boards burn out. you can replace the two caps and save lots of money. then please check out this web page http://www.hometheatershack.com/forums/hitachi/38229-hitachi-p50h401-led-flashes-3-times.html

This web page has info about repairing these. The 4 flashing lights maybe the x sus or the y sus but it's still a good idea to check the sdr boards since its a common failer. I had one tv with a bad sdr board flash 3 time and another set it was flashing 4 times.

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it is problem your TV high voltage unite(EHT)
change it by authorised service centre

Aug 28, 2009 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

Hitachi Plasma TV model P50H401


I think you have problems with the digital main PWB.

If the power PWB failed, turn off and change the pilot ligth to red.

Aug 31, 2008 | Hitachi P50H401 50 in. Plasma HDTV

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I write the same in other consult

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