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Picture disappears after 30 minutes, but sound remains good.

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Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis.If you wish to get some details; check the site linked here.Surf the site with patience.Pull up older posts.It will be best to replace the inverter board as card basis.http://electronicshelponline.blogspot.com/To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS].In such cases, the power supply board might need replacement.To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself.If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board.If this is the case, you have to replace the main board.

Posted on Dec 11, 2016

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Posted on Jan 02, 2017

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Turn on TV and picture and sound are great for about 60 seconds. Then the picture disappears but sound remains.


I would start with checking the power supply 12vdc output, make sure it is stable with no ripple. If the power supply checks out fine, I would then suspect the main board.

Sep 20, 2012 | Vizio VT470M 47-inch 1080p 120Hz 5ms LCD...

2 Answers

Lcd32880hdf 10 months old. When switched on the picture disappears after 2/3 seconds and will not come back on. Sound still remains un-effected.??


If you can quickly get to menu before picture goes blank, then go picture / backlight / set backlight to minimum and it will work fine.

Jul 04, 2010 | Albatron LNX-21TIS-3 Television

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After 30 minutes the vision is disappear tv LCD LT 30 HV


If your TV works for a short period and then the image disappear it's likely the LCD inverter that powers the CCFL backlight. therefore what you will likely need is to change the inverter.
I assume that is you If you let the TV cool down for a while (or use it next day) then you keep having the same problem.
I have the opposite problem where the picture appears after 30 minutes, then stays on. As annoying as it is it's less of a problem because as long as I let the LCD war up for 30 min. then I can use the TV. Unfortunately in your case the TV is only usable for 30 minutes.
You can buy a used/refurbished one on ebay or you could head over to lcdparts.net where the inverter is available at $150 (this was the lowest i could find in online stores).
Good luck with your repair Maciej!

Jun 10, 2010 | Syntax LT30HV 30 in. HD-Ready LCD...

1 Answer

TV picture goes off after 20 minutes


there are bad solder connections on the pictury tube drive module. have it fixed at a repair shop.. the tech will be mystified that you know what the problem was..lol..

Nov 12, 2009 | Televison & Video

1 Answer

TV screen tuurniing on and off, sound remains on.


If its a DLP set have you ever replaced the lamp? If not I would suspect that first..

Aug 14, 2009 | Televison & Video

1 Answer

After few minutes LCD picture went black but sound works ok


most likely the power inverter, also suspect the p/s. best to have a trained tech check it. Julio at milleniumtvsvc@gmail.com

Jul 21, 2009 | Memorex MLT3221 32 in. LCD TV

1 Answer

After 30minutes and over,monitor display disappear


I had a similar problem with the same model; the cable connection into my computer was not good. Try fiddling or replacing the cable.

Oct 24, 2007 | Samsung 206BW Monitor

2 Answers

No picture on a Sony KV-32V65 TV


AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the Cboard, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking.

Jan 18, 2007 | Sony KV-32V65 TV

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