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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1 Answer

How do you take the metal cover off that is over the tcon board on my samsung TV


If like my tv it is soldered on and is an rf shield you have to desolate it from the board.

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Vizio 32" e320 vl turns on then off right away


An overload with any other board, except the main power board too can cause this sleeking (Whistling) sound from the power board. It will be best to contact any service technician to confirm the actual faulty board. Gopakumar Gopalan Google

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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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My Samsung TV HLS4288W shuts off by itself. When I turn it on it repeats with the same, shuts off. I have to repeat this process several times before the TV finally stays on.


There's a loose connection in the power supply of your television.Try to fix this problem.If you want to do the repair,just open the back cover of your TV and look the power supply.Try to resolder the board of the power supply and check the connector to power supply from the board supply.You can power on the televisions while the back cover is open to see that the power supply is working. Thanks!!

Aug 21, 2011 | Samsung Televison & Video

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I have a zenith z42pq20 about a year and 3 month yesterday a hear a thunder, my tv was on, there.s a power failure and then the standbay light turn red but the tv doesn't turn on. The light doesn't...


Sounds like you took a hit. Unplug your set for 30 minutes and plug it bcck in. It could have just locked up the micro. If this does not fix, unplug the set and take the back off. Plug the set back in and check the powersupply for your 5 volts dc. If it is there, replace your main pcb.

Jul 20, 2011 | Televison & Video

2 Answers

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

1 Answer

No picture


My parents bought the same tv, TV ran fine for 2 years then started giving them problems. Blue light comes on then few seconds later turns to yellow. Turn tv off then back on it worked, until last week it would not turn on.

Took it to a repair shop they said it was a bad power supply and it will cost 50$ for this check up, as it turns out the total bill would be $650 minus the original $50 it would only cost you $600.

Needles to say i took the tv home with me. Since they were not going to use it i started looking at it took the back off, removed all heat shiels ect. Took my magnifing glass out and started looking at the power supply come to find out the part was made in China, it was missing a solder joint, pulled my old soldering gun out, five minutes later the tv came back to life.

i hope this helps.

JOHN

Oct 23, 2008 | Westinghouse LTV-32w4 32.02 in. LCD HDTV

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).

Apr 11, 2008 | Philips 42FD9954 42 in. Plasma HDTV

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

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