Question about LG MU-42PM11 47 in. EDTV-Ready Plasma Television

2 Answers

LG Plasma Monitor MU-422PM11 Red Light Problem

When i turn the unit on, it powers up and shows a snow screen for a fraction of a second and the green power light switches to red and the video output cuts out and the unit does nothing more. this happens time and time again, i've tried unplugging it and letting it power cycle, and it dosen't do anything....HELP!!!

Please email me at if you have any solutions or suggestions for me please!!!!

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: LG Plasma Monitor MU-422PM11 Red Light Problem

I had the same issue on a LG 50PX5D, bought in 2006. I changed channels and the picture froze, audio was OK. Then after shutting off, when turning back on got exactly same symptoms. Repair guy says X and Y boards to be replaced. I expect to have it back in a week. PS happened after a power hit, it worked ok for a few hours then this.

Posted on Aug 01, 2009

Re: LG Plasma Monitor MU-422PM11 Red Light Problem

Your unit is in protect mode a short circuit has occured either at x,y z board.Check fuses F52 on y Board,FS1,FS2 on Zboard.Remove P1,P2,P3,P4 if power supply voltage is normal replace right x-board.Remove P6,P7 if the power supply voltage is normal replace left x-board

Posted on Feb 12, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

When I switch power of the LG flat screen tv on the light go green of few seconds then the light goes red again. Can not even get to menu option when light is red

most of the time you will find the caps on the power supplies are bulged and will not let the set to turn on .must be replaced

Mar 03, 2015 | LG 42PC3RA 42 in. HD-Ready Plasma TV

4 Answers

Plasma Tv Turning black in areas and speckles red and green as it gets hot.

plz check if the internal cooling fan are in good working condition. avoid keeping magnetic, very nearby.
hope this helps

Thanks for using Fixya

Jul 12, 2008 | LG MU-50PZ90C Television

1 Answer

TV shutting down automatically after a minute


I also have this TV but mine will not power on at all. Did you ever find a solution?


Jun 25, 2009 | LG MU-60PZ10 60 in. Plasma Television

1 Answer

Plasam with black screen with red and green snow

i have the same tv with the same problem, did you find out what it was?

Jan 24, 2009 | Toshiba 42HP82 42 in. Plasma Television

1 Answer

LG 42 plasma power problem

needs power supply Part number 6709900023A
it is a 171 dollar part, you should be able to order through LG,

Jan 09, 2009 | LG 42PC3D 42 in. Plasma Television

5 Answers

Sansui Plasma, Green and Red Snow

I have the same tv - change the power supply. Corne Bronkhorst

Mar 14, 2008 | Sansui HDPDP4200 42 in. HD-Ready Plasma...

1 Answer

Inability to turn on plasma screen

You have a power supply fault or one of the drive boards that drive the plasma screen is loading down the power supply. This power supply may be part of the entire main board. Good Luck

Mar 23, 2007 | Panasonic TH-42PWD7UY 42 in. EDTV-Ready...

Not finding what you are looking for?
LG MU-42PM11 47 in. EDTV-Ready Plasma Television Logo

491 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Flat Panel Televisions Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers


Level 3 Expert

6993 Answers


Level 3 Expert

18258 Answers

Are you a LG Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides