Question about Sylvania 6842THG 42 in. Plasma HDTV

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Power problem took cover off back of tv check for power and have it. the power doesn't seem to stay on

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  • Anonymous Jul 01, 2008

    Same problem. Green light comes on, then tv goes automatically to stand by without the tv ever coming on.

  • Dale H Jul 01, 2008

    No power. TV will not stay on. When I turn the tv on, the green (power) light stays on for a few seconds and then the tv automatically goes to standby mode without the tv picture ever coming on at all. First time it happened (last week), I unplugged the tv for 30 minutes (per the manual), then plugged it back in and turned it on. Same thing, green light flashed for 2 seconds then automatically switched to standby mode. I then unplugged the tv from the wall outlet AND unplugged the power cable from the back of the tv itself. 30 minutes later, plugged both plugs back in, the tv came on and stayed on. The next day, the tv started doing the green light, red light thing all over again, and the power will not come on.

  • John Borgesano
    John Borgesano Nov 01, 2008

    same as posted above power comes on for 2 seconds then goes to the stand by mode. hearing a relay click on the off 2 seconds later fan spins for 2 seconds also then shuts off.

  • Anonymous Nov 02, 2008

    same problem power off and the same with the lights

  • christinegri Dec 26, 2008

    i just bought mine and it keeps shutting off.



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You have a bad main power supply board. Check E-bay or other sights for a BL0700M01032 I paid 149.95 plus 15 for shipping and changed it myself. Lots of screws but not that bad to change. Beats buying a new TV.

Posted on Dec 18, 2008

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T v popped ,it comes on then goes right back off power will not stay on

Posted on Nov 13, 2008

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Samsung TV won't turn on. Red light is solid, won't blink when pressed. All capacitors seem fine (none swollen or vented).


That model is covered under a class actions lawsuit settlement over bad power supply boards. You need to contact Samsung about this and get a warranty claim started, even if the original warranty is over the settlement terms will cover parts and labor. You can get additional information about this along with contact information here: http://www.ccl-la.com/blog/index.php/samsung-has-reached-a-settlement-in-class-action-lawsuit-over-faulty-tv-power-supplies/

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Samsung 4254 Plasma keeps shutting itself off and then clicks like it is trying to turn itself back on. Sometimes it does turn back on and then shuts off again and keeps doing this over and over. The TV is...


take the back off the tv follow the power cord it will connect to an electrical board. Look at the board carefully you will find a few capacitors look at the top of the caps they should all appear flat if you see any that are bulged or expanded then more then likely that is your problem. I just had the exact same problem with my 50 inch plasma and I fixed it. I removed the back of the tv located two swollen caps unsolder them from the board tested them with a meter and confirmed that the larger 50volt 1500 uf 105deg was indeed burnt and the smaller swollen one 35v 1500uf was still good but changed it anyhow just because it looked like it didnt have much life left.

Apr 06, 2011 | Samsung HP-R4262 42 in. Plasma Television

2 Answers

No Power up. Has 3 relay clicks when you plug it in. No LEDs light up and no flashing code from the stand-by LED. Have service manual. Where do I start?


hello the best thing to do is turn the power off take the back cover off and visual inspect the boards in side get a good torch and check for any bulging capacitors burnt resistors if everythink looks ok then you will have to check underneath the boards for any try joints i hope this helps

regards
shaun

Feb 23, 2010 | Sony KP-53HS30 53" Rear Projection...

1 Answer

Power issue


The Philips Plasma TV have a problem with electrolytic capacitors going bad. I believe you heated some capacitors and your problem may return. If so, try replacing 2540 (100ufd@25v)
and 2508 (4.7ufd@50V).

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3 Answers

Power cylcles off and on


I just had this problem and took some pictures as I learned.

How to remove cover:
http://www.flickr.com/photos/88002248@N00/sets/72157611665895426/

how this helps.

Nov 13, 2007 | Philips 26MF231D 26 in. LCD Television

1 Answer

Red & green lamps shutting off leaving a blue screen


Could you show a picture of the distended cover you mentioned?

 

Were the light blue lines you were referring to, diagonal, or truly horizontal?

Oct 15, 2007 | Sony KP-57WS500 57" Rear Projection...

1 Answer

TV doesn,t turn on


the power regulater for your system have a short take it to a tech to have him fix it orelse you might cause further damage.

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