Question about Samsung LN55C630K1FXZA 55 IN LCD HDTV 1080P 120HZ Refurbished M

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Black Screen After watching for 1-2 minutes the screen goes black but you can still hear the sound. When I shine a flashlight on the screen i can barely see the picture. Whats my problem?

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  • Samsung Master
  • 933 Answers

There are several things that could cause this. You could have a faulty backlight inverter(s), faulty 24V output from the power supply, failing backlight bulb(s), high voltage arcing from the inverter outputs, or a fault with the main board. I would recommend a diagnosis

Posted on Jan 15, 2013

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6ya6ya
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Posted on Jan 02, 2017

Shuttle83
  • 1139 Answers

SOURCE: samsung plasma ppm42s3 , picture wobbling,sometimes screen goes blank

Hello arunaik_6,

This looks as if a component has become thermally sensitive. The best way to find this is to use component cooling spray. It looks as if the problem is localized to the tuner section. Take the back off of the TV and turn the TV on, wait until the problem occurs and lightly spray the tuner section with the component cooling spray watch for any reaction, then if this does not work spray the Microprocessor and the LVDS section and watch for a reaction. The set should go back to normal when it does that section is the problem, try to localize the problem to one component. Then replace that component.

I hope this helps,

Thank you,

Shuttle83
http://www.electron-age-technologies-llc.com

Posted on Dec 16, 2008

  • 11 Answers

SOURCE: Samsung LN-S4041DX 40 in LCD TV

Hi. You can try to go into service mode and reset the LCDTV to Factory Default. This will clear out all buffer over run's and any software related issues. It may fix the problem or it may not. If this doesnt fix the problem than you need to have a qualified Technician to look at it. The problem is in the AV circuit board, a technician who is qualified to repair electronics at circuit board level should be able to repair this problem rather quickly and inexpensively. Most technicians who do not have the expertise in repairing cicuit boards to component level would rather replace the whole AV board than repair it and this will be rather expensive.So talk to the repair shop before you drop the TV off.

Be very careful when accessing service mode. I suggest to write down all information in all areas before proceeding to a factory reset. If you do not record all values correclty you run the chance of not being able to use the TV again. To go into Factory Service mode, use the original remote and in this sequence push POWER OFF-MUTE-1-8-2-Power ON, the set will turn on and enter service mode, if you hit all previous keys correctly. If it doesnt try again. When you are done hit POWER OFF and this will exit service mode and save the data.

Posted on Jan 28, 2009

  • 34 Answers

SOURCE: lg 42inch plasma

Sounds like main board failure and or power board failure. You need to contact manufacturer and describe problem for tech support. Some of the parts in Samsung TVs have lifetime warranties. Change out of two board is about an hour job and service call is usually comped. Hope this helps. J

Posted on Apr 09, 2009

  • 2 Answers

SOURCE: Samsung Plasma 50" No Picture but have sound

BAD Y BOARD

Posted on Jun 08, 2009

KingDWS
  • 1606 Answers

SOURCE: no picture

It sounds like the backlight is out. If you can see a faint image that changes then this is the case. You either need to send in for repair or replace. It can if you are lucky be a connection. You can try removing the video cable and try another source or cable.

Posted on Jul 09, 2009

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Picture goes black after a minute or so...


your problem come from the back light source
call ballast power supply or side neon are burn
you probly need a tech to fix it.
hope that will help

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Could be the signal board has a bad cap, in this case it sounds like you are getting intermitten power to the inverters....when the tv goes down and of course you have audio....Shine a flashlight on to screen and see if you have a picture...look carefully. If this is the case..you have the above problem!

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Sound but no vision, black screen


It's either the backlight lamp or backlight inverter is busted due to a power failure or fluctuation. Here's how to determine which is which:
  1. Grab a flashlight.
  2. Turn on the TV.
  3. Shine the flashlight onto the screen.
  4. If you cannot see any display even a faint one, the backlight inverter is dead, else the backlight lamps are busted.
  5. Replace which ever is the culprit.

Sep 25, 2009 | Sony Televison & Video

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BLACK SCREEN-WITH SOUND


Might be the backlight is out, can you see a picture when shining a flashlight on the screen. if yes you have either a bad inverter power supply or bad screen (panel).
both are serious , also could be just a few bad capacitors on the power supply, if you want you can do a visual of the power board caps will appear swollen on top and are easy to solder in cost about $1 each

Jul 23, 2009 | Televison & Video

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