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Hitachi 32LD8D20UA LCD TV, No Picture, Sound and Backlight Working

My LCD TV stopped working recently, first there were green lines at either side of the screen which went away once the TV had warmed up, then the picture went completely but the sound can still be heard and the backlight still lights up the screen area when switched on. I opened the TV to have a look and one of the capacitors on the power board looks like its burst (the top looks like its rusted), could this be the problem with the screen? Printed on the circuit board at the capacitor is 2 codes, C911 and C850.

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  • Televison & ... Master
  • 75,797 Answers

Replace the TV, the new ones are cheaper than repairing this one.

Posted on Feb 22, 2012

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freetek
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SOURCE: Olevia 237V S11 Backlight Problems

This sounds like a defective batch of fluorescent backlight sources; have seen this complaint before.
This may be tough to acquire since I don't know how standard those are across the industry and Olevia has filed for bankruptcy so you can't count on them.  

Posted on Nov 23, 2008

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SOURCE: "Upgrade" of Backlight Panel

just replace what failed.
I replace the surface mount FETs on the inverters.

Posted on Dec 06, 2008

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SOURCE: Either PSU or Darfon V144 inverter backlight problem?

Hi, Please measure all windings again and see if there is one lower than 900ohm. All CCFL might seem working but only for one second before the protection circuit cuts in. By the way, there is something that I would like to know, what is the type number of your remote control?

Posted on Dec 31, 2008

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SOURCE: LN-T4061f samsung lcd no backlight, no sound, no picture

Replacing the capacitors would be a good start. Replace all the ones with the same capacitance and voltage rating even if they do not look bulge.
Let me know if you require further assistance.

Posted on Mar 14, 2009

taran_2005
  • 10515 Answers

SOURCE: There was a loud bang like a cracker burst and the

Hi,

he pop you heard was probably a scan IC on the Y buffer board or an FET on the Y sustain or z sustain boards.

All of these boards are board level repair,you need to replace the defective board in order to repair the tv set.

I'm not sure about your electronic or tv repair background,but if you have any,and some equipment(multimeter),you could try to fix this yourself.

The Y sustain board is the one to the left from power supply(from the back).

Check any fuse on this board-if any is open=replace the Y sustain.

Same thing for the Z sustain-the one far to the right from the back)

if no open fuse on any of the Y sustain or Z sustain-then some voltage readings will be necessary to diagnose the defective board.

-Vy,is a voltage on Y board-if is too low,disconnect the Y buffer and check again.I voltage comes back up(around-190V,see the exact value on the panel label),then replace the Y buffer.

If still to low,then replace the Y sustain.

It may seem confusing,but these are the steps for a complete diagnose!

Based on my experience with these LG/Zenith units, about 90% of the time is the Y sustain board.


To add on this, most of these models have 2 years warranty.Do not open the TV if it is under warranty.By opening the TV, you would VOID the warranty, and might end up paying a hughe amount.If you are in India, then these parts could be obtained by contacting a local repair shop of repute. He needs to order the board from the dealer and could take a week or so. But, it would be tough to get a qualifies professional who actually work on Plasma's in India.Unfortunately, most of the shops do claim that they could repair plasma, but none of them actually have the qualification or training that is required to get this repaired. For parts or repair, you could contact LG at :-


http://www.lg.com/in/support/index.jsp


Let me know,if needed further assistance.


Hope i helped you.


Thanks for using ' Fixya ' and have a nice day!!


PS - Do accept my solution,if it has been of any help so that i could get the credit for my time.

Posted on Dec 04, 2010

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The fact that it happens consistently or after 10min implies that it might be an issue of the backlights overheating until they shut off or power board overheating to the point where it can no longer provide enough power for the backlight. Try keeping a fan on at the side or back of your TV and see if it makes a difference. It may or may not make a difference, regardless of the issue.

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