Question about NEC PlasmaSync 50MP1 50 in. Television
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??
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
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
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
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
I HAVE THE SAME PROBLEM WITH MY LG RU-42PX11. AFTER ABOUT 25 MINUTES MY PICTURE WOULD BLINK TO A BLACK SCREEN AT RAMDOM. TV TECH TOLD ME IT WAS THE UPPER & LOWER CIRCUIT BOARDS $265.OO PARTS ONLY. SO I ORDERED & CHANGED NOW IT PLAYS FOR TWO HOUR THEN BLINKS. SO NOW I CALL A TECH FROM CIRCUIT CITY $99 TO CHECK PROBLEM WHICH GOES TOWARD SERVICE & PARTS IF YOU GET IT DONE. THE LG SERVICE SHOP WERE I ORDERED THE UPPER & LOWER CIRCUIT BOARDS TOLD ME TO ALSO CHANGE THE MAIN "Y" CIRCUIT BOARD THE UPPER & LOWER CONNECT INTO A $280 PART, BUT MORE DIFFICULT TO REPLACE BY MYSELF. SO IF CIRCUIT CITY HAS A GOOD PRICE I WILL GIVE THE TV TO MY MOM. JUST PAID FOR A SONY BRIVIA 46 INCH 3YEAR EXSTINED WARRENTLY THIS TIME, WITH OPTION TO RENEW!
Posted on Oct 02, 2007
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
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
Have a 32 syntax olevia, power light is on but nothing works. mike
Posted on Dec 26, 2009
Monitor is black and no signl
Posted on Sep 20, 2008
Its the inverter panel
Posted on Jun 12, 2008
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
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
NEW POWER SUPPLY. LOOK OUT FOR THE REPAIR COST. HAVE BEEN QUOTED OVER >$1,000 WHEN POWER SUPPLY IS SUB $500.
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
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
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. http://www.lcdpart.com/Products/t50104500mss.html 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
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
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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