Question about Sanyo 42 in. LCD TV

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Tv powers up and after a couple of seconds the backlighting goes out and the tv stays on.

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The control voltage to backlight inverter board, from the main digital board cuts OFF, after the booting is over. In most cases, a firmware update might help you. Contact the authorized service center for Sanyo. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts. Check the site in 'Mosaic' view. It will make search easy.

Posted on Jan 04, 2014

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Posted on Jan 02, 2017

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Sanyo DP46142 TV comes on for approximately 30 seconds and then screen goes black. Power LED stays on.


Sounds like a backlight problem to me. If you input a signal to the HDMI or Composite input and then it goes black have you tried taking a flashlight to the screen to see if the picture is still there but just dark? That would indicate a backlight issue. That model appears to be an LED edge lit backlight, so if the picture is still there after going black your going to have to trace out the backlight circuit and see whats going on. Usually with LED backlighting if it comes on at all then the LED's are good, its just the driver supply thats failing to keep them on. Some TV's have a small separate board that provides the backlight control, but i suspect with this model its on the power supply board and not the motherboard. Have you checked that board? It could be bad caps on the power supply board, check the voltages to the backlighting when it lights up and then when it goes dark. It could just be some failed capacitors on the power supply causing that voltage rail to drop off.

May 04, 2017 | Sanyo Televison & Video

1 Answer

I thought I asked this already but it does not show up. I have a 15" lcd tv that will only stay lighted for a few seconds on each channel then goes dark. I can kinda see a image on the dark screen. I...


the backlight is either going out or the capacitor for the backlight is bad to where its not storing enough power to run the backlight the start capacitor must be good but the run capacitor might be bad usually the backlight itself goes bad but not if it turns on for a few seconds it would have to be the capacitor.

Oct 04, 2013 | Philips Magnavox 15MF400T 15 in. LCD...

1 Answer

FLX3211b when plugged in the red power light comes. Then when the TV is turned the red light turns blue and stays on. The Element logo appears for a couple seconds then the screen goes black. There is a...


the transformer for the backlight is usually what fails on the elements especially if the logo comes up briefly then the screen goes out. I would check the transformers.

Apr 04, 2012 | Element Electronics FLX-3211B 32 in. LCD...

1 Answer

Picture goes off after a couple of minuites but sound stays switch off then on same result


Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board will solved this,have picture back.It a long board shape.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter backlight board for the replacement.

Mar 02, 2010 | Hannspree XV37 HDTV 37 in. LCD TV

1 Answer

Screen goes black but still sound


This is inverter or backlighting problem. Can you try switching it on and off quickly for a couple of times and tell me if these '2 seconds' get any longer'. If picture stays longer and longer before shutting down, one lamp needs replaced-if not, please replace inverter board

Jan 15, 2010 | Goodmans GTVL19W17HDF 19 in. LCD TV

1 Answer

Monitor goes blank after a couple of seconds.


The problem can be the backlight inverter board or bad capacitors in the power supply section, I have seen bad soldering of the wires to the lamps are bad also.
http://en.wikipedia.org/wiki/Capacitor_plague

Nov 05, 2009 | Sony SDM-HS74P 17" LCD Monitor

1 Answer

Screen goes black after about 10 minutes...POLAROID TLX-04240B


Simple Fix Repaire the backlight
repair man sure www.teexp.com

dont shoot the messanger!

Jun 13, 2009 | Insignia 42" LCD Flat-Panel HDTV

1 Answer

Sony KDL-32ML130 lcd tv


Not really that tough. Sounds as though the backlight is shutting down, either from a power supply failure, or a failure of the backlight circuit itself. You can verify this by holding a flashlight to the screen in the area where the menu usually appears to see if it displayed on the LCD panel with no backlight. If you can faintly see the menu displayed, your backlight has shut down and the most likely cause is the backlight inverter board, followed by the power supply and the backlights themselves which are part of the LCD panel. If you found this information answered your questions, please be sure to rate it. Thanks!

Oct 24, 2008 | Televison & Video

1 Answer

Backlight problem


if this is a new laptop, then I am guessing you are using it on battery, and you may have some power save setting turned on that is dimming the screen...

Take a look at your power settings under control panel...

M

Jan 01, 2008 | IBM ThinkPad T43 Notebook

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