Question about LG LM7600 47 in. Cinema 3D Smart TV

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47LG7600. It was on and suddenly popped, hissed and completely went black. No sound, no picture. The red light is solid. Is it a bad mainboard?

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  • 6 Answers

Open the unit a look for bulged capacitors especially on the y sustain board

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

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SOURCE: LG RZ 37LZ55 37 in HDTV LCD Screen Dead

This is likely due to a failed power supply. Replacing the power supply board should solve the problem.

http://www.reviewcentre.com/reviews110919.html

Cr1spy

Posted on Apr 06, 2009

  • 8457 Answers

SOURCE: No picture or sound GV47LF

Buy parts for replacement like capacitors,or board.
Ur backlight video inverter board is dead.Tries these
Websites Shopjimmy.com or Ebay.com.

Posted on Sep 29, 2009

vinnyq
  • 157 Answers

SOURCE: tv made a loud pop sound then went black...sound

This is a common failure in many PLASMAs. One of the boards in the TV blew. Most likely It is going to be the Y-sus but could have also taken out the Z-sus(sometimes called the X-sus) and the Y-drives. These boards put and maitian the picture on the screen. The best way to tell is to check the voltages on the boards to see how extensive the damage was but I would defintly start with the Y-sus.

Posted on Oct 09, 2009

  • 117 Answers

SOURCE: Loud Pop, no more picture

sounds like a large capacitor has gone on main board
check for swelling or bulge/can be square blue in colour

Posted on Jan 05, 2010

SOURCE: while checking Vscan voltages on my LG du-42px12x picture died.

I have the same problem the pic went out but have sound. where do i go to get the Yboard? do i need a special number off of it or something? I took it to repair shop and he said it would be like 500 dollarss to repair. but i see all kind of yboards on ebay for like 150?? how do I know what one to buy?

Posted on Aug 08, 2010

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1 Answer

While checking Vscan voltages on my LG du-42px12x picture died.


I have the same problem the pic went out but have sound. where do i go to get the Yboard? do i need a special number off of it or something? I took it to repair shop and he said it would be like 500 dollarss to repair. but i see all kind of yboards on ebay for like 150?? how do I know what one to buy?

Mar 15, 2010 | LG DU-42PX12XC 42 in. Plasma HDTV

1 Answer

Model LG50PX1D Loud pops, screen is red, picture hard to make out


One of the boards went bad. The sound you heard is either of a capacitor or an IC. It might be a bad Sustain board. Look at the boards you may find a bad chip with a hole in the middle or a capacitor with blister on the top.

Good luck
N Sabre

Nov 08, 2009 | LG 50PX1D 50 in. Plasma Television

1 Answer

Plasma Hyundai 42'' TV ,NO SOUND OR PICTURE


most times then not it's the capacitors on your power board that blew there for not supplying the tv with enough power if you open it up and check the capacitors it should be leaking some kind of liquid or the tops have bubbled up. its an easy fix cost>>2 dollars each

May 21, 2009 | Televison & Video

1 Answer

RCA 52 INCH D52W20B WON'T COME ON


A 1995 60 inch rca good picture and sound. Then it started a cracking noise and a hissing sound, then the picture went blurry. then it was nice picture and sound, then it died. took the back off and turned out the lights. Plugged the tv in and out from the wall socket and there was a sparking noise and a small arc when i plugged it in and out a few times ,at the part that the power plug plugs into.The white part that is beside the white power plug part has thick red wire coming out of it and goes into another plug that has more red wires in it. but the big white part beside the power plug part looks burnt and has black powder on it. that part is probably the problem but maybe not, what it the name of that part and how much would it cost and is it plugged in or soldered.

Oct 18, 2008 | RCA P52937 52" Rear Projection Television

2 Answers

I heard a pop


You'll need to replace the Y sus & Z sus to complete the repair! The Y sus is what has made the z sus pop! Trust me! Also it is recommended to replace the Y drive or drives. Please feel free to give me a call if you have any questions! I'm more then happy to help you fix your TV!

Ask for Dave @ 1-503-432-9904 or message me @ pleasefixitdave@yahoo.com

Thank you! :-)

Aug 12, 2008 | Toshiba 42HP66 42 in. LCD Television

1 Answer

No picture, but power light and sound OK


The problem you have there was a loss of vertical deflection followed by a complete failure of Q301, the vertical Ic LA7833S.
It may have been in part due to the feed caps located in that circuit and there will likely be NO outward signs of the failure.
The Ic needs to be replaced and the electrolytics in that circuit need to be measured with and ESR meter and replaced if bad.
If it's starting to sound a bit beyond your ability I strongly suggest having a qualified shop do this because you can overheat the vert Ic easily just soldering it in...
If you have a shop do it you might ask what they charge to replace the vertical Ic and ESR the caps in that circuit. Explain to them what you have here with regards to how it went out, dropping to a horizontal line before going completely dead... The more detail you can give the easier it will be for the tech to troubleshoot the problem.
Good Luck!
Bill

Nov 24, 2007 | Toshiba 50H72 50" Rear Projection...

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