Question about Hitachi P50H401 50 in. Plasma HDTV

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No picture no sound but the power power light is on

Can I purchase and replace the power unit by myself?

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Try hitachiserviceusa.com or shopjimmys.com to get power supply--almost anyone can replace a board--simple-only have to deal with screws and plugs

Posted on Sep 11, 2009

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Posted on Jan 02, 2017

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Take a flash light and point it close to the screen . do you see a picture.

You have a bad back light or inverter the powers the back light. in any rate here the unit will need a repair shop because these are hard to get to you have to dig.

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I have a LG 42 inch plasma tv model 42pc3d....the other nite my wife was watching tv then she heard a loud pop and then noticed that the tv has sound but the picture is washed out mainly with black and...


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These plasma TVs have a common failure with the Ysus boards, more specific an IC that is underneath the big heatsink. The capacitors in the power supply became defective as well.
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Your mainboard is damaged, the mainboard is the one where you plug all the cables (component HDMI), it is really easy to replace, you only need to take special care with the screws.
1. remove all screws in the back.
2. unplugg all cables from mainboard.
3. remove all srews from mainboard and replace it.
4. put all screws back and then plug all cables again.
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8. Enjoy your TV again.

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Hi...I am sorry to say that I had this exact problem. It ended up being the upper and lower panel drives. I contacted Hitachi and even though my unit was out of warranty, they agree to pay for parts. I paid for labor myself, and it cost me $199.95.

Good luck with it...let me know how it turns out for you.

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This is very possibly a power surge, can you tell me how many times the light blinks, you probably have a bad power board now if you had a power surge.

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Not unless you have taken the time to learn all the safety issues concerning the HI voltage safety facts, in the repair of electronics? It sounds like your tv has a problem in the sweep/power supply circuits, and since these sets have NO user serviceable parts< its best too leave these types of repairs to a certified electronic technician. Good Luck

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