Question about LG 37LC7D 37 in. LCD HDTV

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Have a 37" lg tv screen flashes and the audio is fine

Put in a new power board now the screen flashes but the audio is fine. Picture is good when is flashes on. About 3-5 seconds.

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: frozen picture on LG LCD 37"

Try One of your working TVS and connect it to your cable outlet of the TV that is having problems. If that TV Does not work then there may be a degraded fitting or the Leg coming of the splitter to that outlet could have a Low Signal Problem
Next Take the First TV that was not working properly and put it on the cable outlet of one of the TVs that is working properly and if the TV set works on that Channel then you know it is not your TV that it must be the cable

Posted on Feb 28, 2009

  • 945 Answers

SOURCE: 37'' LG lcd tv, no power

I just want to clear things here.
The stand by light will remain on whenever the tv set is turned on by a button on the side of the tv.

Then use your remote to turn on the tv, but wait as it can take 10secs before you get a picture.

Posted on Nov 04, 2009

SOURCE: TV has no display -- Need advice on Z Sustain Assembly Board

Send your board for repair / exchange - we service those by truckload :-)

http://www.coppelltvrepair.com .

Posted on Apr 05, 2010

  • 26 Answers

SOURCE: A simple question - My new 42" LG tv is fine -

You should be able to change the aspect ratio to fit the size of your screen. This will be the 16:9 4:3 16:10 settings.

You can access these by going to MENU---> PICTURE -----> Select ratio that works----> exit out and watch TV.

IF this will not fix it you need to look into the signals being fed to the TV as sometimes they can have a funny effect on the output picture. Some cable boxes will alter the picture and then it won't come out right on the TV. If it is all inputs doing this tho then changing just the Aspect ratio on the TV should solve the problem.

Posted on Jun 07, 2011

SOURCE: LG 42LC7D-UB, Bad LCD Controller Board????

Steve, that was awesome. Thanks a bunch. I already have the tools and I can get the solder easy enough. Thanks a again. I went to Best Buy this weekend and all they could say is that the entire board would need to be replace and that they really recommended a new tv as the cost for the new board would be as much as a new TV.... :( typical of them!

Posted on Nov 22, 2011

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You must use a usb memory stick to copy data values from the old board to the new board. First you have to put the old board back in, insert the stick then follow prompts to copy register values to the memory stick. Then put the new one back in and load the values back onto the new. I would definitely have a certified tech do this process. You don't want to make a mistake with the old board values.

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LG 37" lcd tv weird noise using hdmi ports bought new main board still does the same thing! Need solution! Lg says "i don't know never heard of this problem", BS!!!!! Ok remote for the tv worked before...


Use an other HDMI cable. Still the problem persists, Check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts. Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts. http://electronicshelponline.blogspot.com/

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TV's on. No Picture...No Sound


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.

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5 Answers

Philips 37 flat screen


U better have it checked by a qaulified tech

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