Question about NEC PlasmaSync 50MP1 50 in. Television

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Monitor goes black - green light stays on

The picture is perfect when the screen is on, but it goes black very shortly after startup, and sometimes goes back on and off in no apparent pattern. Sometimes I can manipulate it back on for good by turning the system on and off a few times but it is very unreliable. Any clue as to why this occurs and how it may be fixed??

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  • 35 more comments 
  • Sultani Nov 08, 2007

    When I turn on my LC-37P50E four columns (each about 4") with green color appear in black backgound in the right side of LCD.

    When I watch tv black things on this four columns are seen in green. what should i do?

  • pizzaman1 Nov 08, 2007

    I was watching my tv and it just went off. i also have dish sat. tv on it. the blue light comes on for about 2 seconds like it' s going to come on but then it goes out. after that the red light flashes on the botton left corner. i have unplug the as well as turned the power off and on but this does nothing. What can i do?

  • fume Nov 20, 2007

    same exact problem here ( as fafsi), will any advice at this time ..Thankz

  • Anonymous Nov 22, 2007

    Monitor goes black - green light stays on

  • Anonymous Nov 24, 2007

    I have the same problem. Tv starts up go black within 20 minutes green light still on. If I shut it off for a period time say 20 minutes the screen goes back on. The problem then repeats itself. Took to a recommended sharp repair center . They quoted me 800 dollars for a new lcd panel . The tv is only 15 months old. It's my first Sharp and probably my last. 20in aquos sharp tv brought july of 2006. If anyone has any other ideas let me know.

  • Anonymous Nov 27, 2007

    My problem with the Sharp Aquos is it goes black after a cople of minutes, we put a fan on it to cool it down and it does seem to work better, but it still turns off.After reading the same problem with other people, I would suggest avoiding Sharp televisions and buying something else with a long term warrenty.

  • caitstern Nov 30, 2007

    same exact thing on an ns-lcd 22

  • Anonymous Dec 06, 2007

    mine just goes black and the sound stays on whats the fix?

  • Anonymous Dec 13, 2007

    I have a 42 inch LG lcd I just bought about 3 months ago starts off working screen goes out you have sound, comes back on goes in and out then eventually sound goes out and then the tv wont turn on you have to wait a while turn it on and it works. Other times it works with no problems

  • Anonymous Dec 27, 2007


  • Vanoie Dec 28, 2007

    I have mine connected to a computerit worked fine. One morning turn it on and no picture. I thought it may have just over heated? But still have the same problem. I did get picture back for a few minutes.

  • BWMoore Dec 29, 2007

    My Toshiba 42HL67 is two days out of the box. Suddenly we lost all video in the middle of a PS3 game. The sound is still present and the green light stays on. I've read the entire manual including the troubleshooting section, which does not address this problem. I've tried pushing all the buttons on the remote, but with a black screen it's useless. I'm waiting for my sales rep from the local TV store to call me back with a solution, I hope.

  • Applesnacks Jan 01, 2008

    When i turn on my computer it goes black after like 2 seconds. I can always turn the monitor off and on again but it goes black again. (It is my monitor because i checked it by conecting it to my second computer)

  • wunjo Jan 15, 2008

    When HDMI (PC DVI to HDMI) has a connection, the TV will not turn on when the power button is pressed (either from remote or TV).

    The green light becomes activated, but that's it. Any attempts to turn off the TV, change the channel, input, etc, all fail. I have to unplug the TV and plug it back in to "reset" whatever problem is.

    Any Ideas? RMA time?

  • Marco6321 Feb 10, 2008

    Monitor want black - green light stays on problem

    Tried all other video ports same result. New unit only 2 months old

  • Gerald Tukula Feb 13, 2008

    The LCD TV is new but when you switch it on the LCD just blinks i.e. it comes on then off.

  • Anonymous Feb 15, 2008

    the screen is black but the green button turn on and off continusily. help!!!

  • scouse270162 Feb 21, 2008

    got a philips 26pfl5522d/05 screen lights up on switch on then goes of with blue light stays on

  • Anonymous Feb 26, 2008

    have sound no pix blue sceen back to black whit sound

  • Anonymous Mar 01, 2008

    screen goes black and red light flashes 4 times and pauses as a pattern what has happened

  • pansey21 Mar 03, 2008

    I just got this product, plugged it in and i have audio but no video. the green light is on but the screen is black. what can i do or what do i need to do?

  • Janine Pfersching
    Janine Pfersching Mar 09, 2008

    ** Picture but I get sound. Told I need all of the boards replaced but that it costs more than the tv new. Any suggestions on where to find replacement boards to diy.

  • Anonymous Mar 19, 2008

    i have an nec 42mp3 and it does the same thing.

    it seems like the longer it's unplugged, the longer it will stay on when it's plugged back in. the screen will go on and off when it wants, though.
    Powering on and off a few tiems usually fixes it. Picture is perfect when it's on, though.

    after being unplugged a while, the screen fires up with random red static then settles down. minutes or hours later, the screen will kick on.


  • Anonymous Apr 27, 2008

    I need to turn the tv on several times in order for it to remain 'on'. I'm able to keep the picture on if I turn the OPC off and set the brightness to low.

  • Anonymous Apr 29, 2008

    yeh it shows a little white then boom! black with green light on!

  • katana62678 May 22, 2008

    I have the same problem, the TV is plugged in, when the power button is pressed, the green light comes on, but there is no picture, regardless of what buttons I push on the remote or on the tv itself. Was there ever a resolution for this or what part(s) needed to be replaced?

  • guest5 May 27, 2008

    We have the same issue. Black screen with sound. The picture will come back on periodically but alas goes black again. Has anyone had luck getting theirs repaired?

  • Billybob1957 May 28, 2008

    Monitor goes black -volume stays on and green light stays on problem, and notify you when a new solution is offered.

  • Anonymous Jun 22, 2008


  • 2135 Jul 14, 2008

    monitor when black while i was watching a movie. Sound was still working. Now the screen flashes when I turn it on, but immediately goes black and then I loose the green live.

  • Anonymous Jul 21, 2008

    the monitor keeps on going black, red light flashes a few times and tv switch off, this is a brand new tv. 2 months old. is it a setting or a fault with tv. please help if anyone knows....will apprciate it a lot!! dirk

  • PIENAARDIRK Jul 21, 2008

    the monitor keeps on going black, red light flashes a few times and tv switch off, this is a brand new tv. 2 months old. is it a setting or a fault with tv. please help if anyone knows....will apprciate it a lot!! dirk

  • zkannapel Aug 02, 2008

    Turn the tv on it will flash digital tv for about 10 -15 seconds and then the green light will turn off and go on stand by mode

  • kikocat001 Aug 11, 2008

    Our TV is almost 8 yrs old. Recently the picture started to go off intermittently to a solid grey screen with pink/red lines. Recently we dont even get that - it goes to solid black. We have to turn the screen button off (volume still on) and leave it off for 10 - 20 minutes and then turn it back on and it will work for a few more hours. We have a PRO 710HD Elite.

  • gatorrx Aug 17, 2008

    Have the Sharp LC-32D41U, 1-1/2 years old, kept losing picture and sound, turned set off and then on again, would immediately lose both picture and sound again. Authorized Service Center (out of warranty, of course) said it needed RDENCA161WJQZ (Power CBA) and also

    DUNTKD640FM22 (Main CBA); parts/labor $799; TV bought from HSN for $999. TV will now collect dust in basement. Seems as if we are a true throw-away society.

  • scrutor Sep 03, 2008

    I have 4 of the xp17w and they all have the exact same problem. : (
    Nothing seems to help.

  • Anonymous Nov 01, 2008

    picture goes black



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We have seen connection problems on the Y-Sustain board causing this problem. Connections breakdown due to the high heat and frequency of operation on this board. Have a qualified service tech. inspect the board, if damaged, it is best replaced to assure a quality repair. Be sure to ventilate this set properly, overheating leads to 80% of all failures in these sets. Joe Weibel

Posted on Feb 12, 2007

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I have a Hitachi plasma, 42 inch TV. Its about 2 years old. Anyway when we tried to turn it on, the screen would come on for a few seconds, then it would go black and the power light would flash. The sound still worked fine. Anyway I opened up the back and noticed one of the two cooling fans was not working.

I ordered a replacement fan online using the same model number of the fan in the TV and now the TV works fine. A serviceman I spoke to said that its a safety feature to stop the TV from overheating. If one of the fans is out, it goes into safe mode. Hope this helps. Taking the back off the TV is pretty easy. The fans are easy to remove too. Something to look into. I figured if the picture was clear for a few seconds that it couldn't be something major with the X or Z boards.

Posted on Nov 01, 2008

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It sounds like a bad connection, solder or otherwise. You can probably get the symptoms to come and go by lightly tapping the monitor cabinet. Don't continue to do it though, it may make it worse over time. A competent repair shop should be able to handle this type of repair.

Posted on Dec 24, 2006

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Could be the back light is not working properly, some have a balance circuit that needs to see the upper and lower back light on and if one is not working it shuts down .Also some models are wired through the processor , you cna change out the processor or hard wire around the processor the back light.The back light will come on only when powere is cycled and should work for you just fine and is the cheapest method.

Posted on Jul 19, 2008

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Posted on Oct 02, 2007

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Replace X-Y sustain boards

Posted on Jan 19, 2007

I have a TV repair friend that sees this issue all the time. The cheap buggers pur 3rd grade Caps in the power supplies (could be as many as 30) made in China that don't work worth a damn and could pop in the slightest amount of excessive heat. Oh-yeah, the Plasma's make lots of heat and have poor ventilation. Fix: Replair all the caps in the power supply with good quality ones and your good to go.

Posted on Aug 16, 2007

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The fact that the green light is on means that the correct video signall is being recieved,there fore the back light invertor could be at fault. try to see if you can faintly see the picture during the aforementioned fault condition....if you can ,then the invertor is the problem .this isnot a hard fault to repair as it is only a high voltage ac powersupply...colin campbell

Posted on Jul 06, 2007

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Have a 32 syntax olevia, power light is on but nothing works. mike

Posted on Dec 26, 2009

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Monitor is black and no signl

Posted on Sep 20, 2008

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Its the inverter panel

Posted on Jun 12, 2008

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I have the same problem it get disoriented and I have shut the tv off and on but it jumps and turns green and red. I contacted customer service and they will not return my phone call. I purchased this tv 2 months ago.

Posted on May 06, 2008

I believe it is an over heating problem and a bad component short

Posted on Mar 03, 2008

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Every once i while half the screen turns pink and white, the bottom stays good, so far it has gone away, what do i do?

Posted on Mar 02, 2008

Having the same problem here mates >_<

Posted on Feb 11, 2008

The backlight inverter is the cause of the blue screen flash and then the TV goes blank. There is a Yahoo Group that is dedicated to the problem. Some of the members of that group fixed the TV for $25 while others fixed it for less than $200. Olevia basically lied to the consumer when they said that the inverter was part of the LCD panel and the TV had to be returned for them to fix it. Olevia does not manufacture the inverter it is made by Darfon. However, Olevia could have offered a redesigned circuit board at a reasonable price and made a whole group of consumers happy that their investment was a good one. They chose not to and that will hurt their reputation.

Posted on Dec 14, 2007

I had this TV and had the very same problem.  It's the power board and circuit board combination.  I had it under warranty still and they contracted an A/V tech to look it over.  It's been 5 months and I'm considering a lawsuit in order to get my money back.  Hope you have better luck - but that is the problem!  

Posted on Oct 18, 2007

Good tip henlopen, I have a similar problem. I got the TV from my uncle who claimed the problem is intermittent. All I observe is that when I plug it (Insignia HDTV32 inch), the Led shows red and then when I press power it goes blue, tries to turn on the screen, the screen backlight comes on for a half second then it goes off and the LED goes off and comes back on as red a moment later. A crack is heard from the speakers when this happens. After that pressing the power again causes the LED to go off then come on as red again. If I hold the power down, the speakers make a crack noise and the LED switches from blue to red constantly. I'm thinking this is an internal power problem or something, but I'm not very experienced with circuitry repair, other AC to DC conversion circuits, which are mad simple.

Posted on Jul 24, 2007


Posted on May 07, 2007

Do not get mad and spank the back to hard this may ground-out the main power and blow the fuse.

Posted on Apr 08, 2007

It's the scaler board according to my tech. The replacement board is no longer manufactured. Mine has the same symptoms but the light alternates rad and green.

Posted on Feb 03, 2007

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I was having the same problem with my Pioneer plasma PDP-4340HD (randomly shutting off and after a few minutes I could turn it back on w/ the remote) then, one time, rather than shutting off it flashed the red and green boxes. I replaced the system cables and now it won't even power up. I also get a (red) flashing stand-by light on the media receiver and if I push the on/off button on the remote or the display panel the (orange) recording timer light will flash for 10 or 15 seconds and then quit. Still no power. Any solutions?

Posted on Feb 02, 2007

This is component level failure - probably a filter capacitor.

Posted on Feb 02, 2007

Change y sustain board or might also need z sustain board form LG

Posted on Jan 29, 2007

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I have the same PDP-4330HD and have the same problem. It started several months ago very intermittently. The frequency increased until it is every 5-10 minutes. Real pain! In desperation, I removed all the cables from the monitor and the receiver, opened up the receiver and gently pushed the capacitors and other components looking for something loose. After I put everything back together again, the set worked perfectly for 8 days...then the same symptoms reappeared. Hard to believe that the connections have loosened again, so it must be some component on one of the boards in the receiver. I am at my wits end. I can only envision the troubles of finding a competent, honest repair shop!

Posted on Jan 29, 2007

This sounds like you have a bad 10mf caparcitor in your power supply have it checked out by qualified tv tech.

Posted on Jan 16, 2007

Possibly a bad inverter. I found this web site. Sounds like your problem.

Posted on Jan 15, 2007

Same problem as mine. Best way to fix this problem is to send in your tv for a warranty repair ASAP. If you don't, your tv will go black permenantly.

Posted on Jan 12, 2007

Update your chipset drivers

Posted on Jan 08, 2007

What worked for me was unplugging the back plug and plugging it back in. Worked like a charm.

Posted on Jan 02, 2007

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Posted on Jan 02, 2017


  • 103 Answers

SOURCE: Monitor shutting off with blinking standby light.

Very expensive to fix.You hve a bad ysus board.Nec will re-build theboards as a set 1000.00 plus

Posted on Mar 22, 2007


  • 2 Answers

SOURCE: goodmans flat screen TV.Blank screen

If it is a LCD TV, and there is a faint picture, it is probably the backlight or inverter board (probably the latter). This is a common problem (especially with PC monitors).
Do an internet search for your model and inverter, you may be able to replace it.
Make SURE you REMOVE the power lead before opening the set !!!!

Posted on Mar 03, 2008


Frank Fulton

  • 1114 Answers

SOURCE: Computer monitor goes green

Reload the software and test. Beyond that, try it on another PC if possible. Then check for any updates that have been installed from windows regarding video or players. If there, remove and reboot. hope this helps

Posted on Jul 07, 2009

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Monitor goes black - green light stays on

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Answer Antenna is not hooked up to television.
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