We have a Zenith LCD TV. Cable is working but all of a sudden the TV went off. Tried to turn it back on. Green light went on...no voice and then the red light went on again and it turned off. Could hear a sllight ringing sound in the TV. Could it be something simple we could take care of ourselves?

Samsung LCD TV with no video and high pitched sound - Digital TV ...

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Jan 7, 2010 - 26 posts - ‎15 authors
Hi, I have a Samsung LN40A550 LCD TV which I have had for just over a year. ... I was watching TV yesterday and all of a sudden the picture went all. ... started makinga very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen.

Samsung LCD Green Screen - Forums - CNET

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www.badcaps.net > ... > Troubleshooting TVs and Video Sources

same problem all set to replace TV but tried another source DVD instead of dish and it was fine. Possible the cable (cheap HDMI) but reboot the dish (hard) pull the plug and fixed it up, probably the HDMI connection at the source or the TV (or the cable)

the light polarizer on the blue lcd panel is fried due to excesive dust and heat, and therefore need to be replaced. unfortunately, zenith may not sell individual parts of the optical engine, so you'll have to replace the whole optical engine.

Power supply Board Call UED 1-800-648-6657 or try Encompass 1-800-638-3328

I lost my remote for my Zenith TV. I have had the TV for over 10 years. QUESTION: How can I set my TV to channel 3 or 4 with out the remote?

Thanks.

Horace

prob not worth repair sounds like horiz sweep circuit. 150 200 to repair. 

I also has this problem, found any solution ??

Have a problem with Zenith 37 HDTV. Medel number: Z37LZ5D As wathcing TV, along with 'pop' sound, TV went dead. LG service center gave an advice to unplug the power cord and press ON/OFF power switch about 1 min. Then plug power back and turn on the TV. Well, the green light blink for a while and solid green, but still no screen, no audio. Search the Web and someone suggested to replace Power Supply Board which will fix the problem. Again, search the Web and came out with Power Supply Board. LG Electronics/Zenith 'Power Supply Assembl' with $124.95 from PartStore.com. Is it the right solution? Do I have to replace entire Assembly Board? not just replacing some fuse? Any cheaper way to do? If I have to replce PSA board, any suggestion to how? Comment posted on Apr 22, 2009 I have a basic knowledge of electric and electronics, such as rewiring entire house for renovation and assemble entire computer from scratch.
Actually, the TV belongs to my father and the problem that I stated was based on what he told me.
So the question is based on the symptom that I posted, how sure are you that the problem is the Power Supply Board?
Is it good to order PSB? Comment posted on Apr 23, 2009 Purchased 2 and half years ago. Expired one year warranty. Comment posted on Apr 23, 2009 Zohail,
This is LCD TV.
There is no problem with the wall socket nor current.
I put other appliances on same wall socket and worked.
It has to be internal problem.
As I mentioned on the main post, there was a 'pop' sound while watching and TV went dead.
Turn on remote control, there is blink green light and then green stays on, but no sound, no screen.
Turn off remote control, light turns red. Comment posted on May 14, 2009 I fixed the TV.
Orderd power supply board which cost me $136.51 total.
Replacing was simple.
Just removed the rear panel cover then electronic board housing cover.
Took power supply board with all the connector cables and replaced with new one.
Problem was a transformer connector which got burned and blow up the plastic cover.
But no problem with fuse and capacitors.

Thanks all for advises.

I could be wrong but sounds like your plasma display is going bad. What is your model number?