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Hitachi 42hdt50m plasma no picture but the green light comes on when powered on

Need help on trouble shooting the problem so i can replace the fuses or the board that is causing the issue. have the back off already just not sure where to start.

Posted by Anonymous on

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5 Related Answers

Anonymous

  • 579 Answers

SOURCE: Hitachi 32LD8700 - TV won't turn on although has power

The general problem with LCD type TV's is that the power supply fails. They are very sophisticated designs that are difficult to troubleshoot and generally best to just replace the module, but sometimes there is visible damage in some of the electrolytic capacitors (visibly bulged) and high voltage rated parts can be substituted.
Hope Ya Fix It

Posted on Feb 10, 2008

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Anonymous

  • 2 Answers

SOURCE: Hitachi HD 1080 has blue power light on but no picture

Press the reset button...it's on the bottom to the right (underneath the TV). Same thing happened to me.

Posted on Feb 24, 2008

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Anonymous

  • 2 Answers

SOURCE: Hitachi 50" Plasma (P50X01AU), power light comes on but no screen

Hope you already resolve it, if not, here what I went through 1. Try to get a service manual for your model ($10-18) from http://www.service-docs2.com or similar place. 2. Open the back and follow instructions how to remove and test the SDR-D and SDR-U board on the far left (take one off, see if you could see half the picture). Inpsect the chips on those two boards, you might be able to spot the burned out holes (that would be the defected board, seemed to be a known issue for particular models) 3. If it is the board, go to ebay and get the pulled out board replacement ($70-90) I fixed my 50 inch plasma this way

Posted on Jun 12, 2009

Anonymous

  • 1 Answer

SOURCE: intermitten problem with hitachi plasma on power up

well aparently all you do is fish for customers to buy into your sevice!
I DIDNT GET ANY HELP FROM YOU GUYS, TAKE YOUR "FREE" TECH SUPPORT AND SHOVE IT UP YOUR ***!!!!!!!

Posted on Nov 13, 2009

Anonymous

  • 253 Answers

SOURCE: Hitachi 42PD7200 Plasma TV gone dead

this problem is from smps power supply of your tv circuit, may be power capacitor may be short , power transister may be short pls check some spair of power supply

Posted on Apr 06, 2010

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GOOD question and well asked----Start at the beginning.

if light on main fuse is good---do you hear the power relay click on and off?

These sets for trouble shooting use a number of green and one red LED inside on the board--the red one should be on when power is connected and the others at turn on all should light--if do this with back off look for the Green ones---when set turned on do all light and then go out--look for one that goes out first or last---each is connected to a specific voltage coming out of the power supply---they will lead you to the area where the trouble is---this set is old enough you may be able to find a service manual online.

I have fixed a lot--going to need a volt/ohm meter for any real tests.

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for more info on this set please check out http://www.hometheatershack.com/forums/hitachi/38229-hitachi-p50h401-led-flashes-3-times.html
if will tell you how to trouble shoot this tv. these tv's are known for two caps in the power supply to go bad and they need replaced then you have to test the sdr buffer boards if they are bad you need replacement boards or you can send them off to be repaired.( Repairing the buffer boards is a lot less then replacing them ) the link for the repair guy is on the page. this guy also sells the repair on ebay but if you contact him directly i beleave the price is lower. just tell him you were send over by home theater shack.
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I have had this problem in some models of plasma sets before. In most cases the power supply and main drive boards had to be replaced. In a small number of cases the failure was the screen itself.

In all cases, the cost of the repair was expensive. For the screen failure, the set was scrapped.

Jerry G.
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