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I HAVE A HITACHI 55" LED LCD HDTV THE SCREEN IS BLACK, BUT THERE IS SOUND. I CHANGED THE LED BACK LIGHTS, THE T-CON BOARD, THE POWER SUPPLY BOARD, AND THE MAIN BOARD. STILL NO PICTURE,

SHINE A LIGHT INTO THE SCREEN AND YOU CAN SEE THE IMAGE PLAYING

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  • Hitachi Master
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Hi the led in the panel ha shorted out thanks

shaun

Posted on Apr 23, 2017

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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

Have sound but no picture.backlight LEDs flash once on/off 1st on.can see picture on screen (any channel) using flash light...already tried new LED converter...all working then screen went black.


Back - light problem. 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://electro-medical.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.

Dec 06, 2016 | Hitachi Televison & Video

1 Answer

After a thunder storm i have sound, no picture, the tv powers up, the back lights are on, should i suspect a bad lcd screen?


Something else is going on. The T-Con board has no other function than controlling the picture. If there is a separate board for the led drivers, I'd suspect that one. The main board controls the sound.

Mar 11, 2016 | Samsung UN60D6000 60 Inch 1080p Smart TV...

1 Answer

Turn tv on picture for a secondthen goes black but still sound model number is 55LS4500


Back - light problem. 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.

Oct 15, 2015 | LG 55LS4500 55 Inch 1080p LED LCD HDTV -...

3 Answers

I have this sony tv model no.KDL 46 VE5 no power at all.what could be the problem?


There's a fuse on the power supply board if not blown change the power board I found one for 8 dollars on eBay.

May 30, 2014 | Sony Grand WEGA KDF-55XS955 55" Rear...

1 Answer

I have an LG LCD 55LH40 tv where the screen went black. My directv was doing some kind of reboot because we had a power outage, bad weather, and it restarted and the tv was on and the screen said the


Good day..

that problem is cause of bad inverter board or T-con board..

If you have backlight the problem is T-con board..if no back light the problem is inverter board..

Hope it helps..

Jun 13, 2012 | LG 55LH40 55 in. LCD HDTV

1 Answer

Screen went black while watching, no sound


Almost for certain your power supply board is bad, Can be repaired at the component level only if you have some electronics savy! Good Luck!

Dec 26, 2008 | Hitachi 55HDT79 55 in. Plasma HDTV

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