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POWER SUPPLY while watching TV. A big pop and sparks shot out from the back of the then the TV turn off. I open up the back looked around could not fine any burnt spot or anything that looked like it had melted. Then I plugged it back in and it worked for a while then some more sparks happen again this time I saw that they were coming out in the area were the power cord plugs into the board. I NEED SCHEMATICS OF POWER SUPPLY OR BETTER YET THE SCHEMATIC OF THE TV HOPE YOU CAN HELP --- THANK YOU

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Zenith are famous for bad soldering even going back to the 80s with the 960-05 boards in the space command sets.
i would pull out the circuit board and check the soldering before doing anything else.

Posted on Sep 09, 2009

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Posted on Jan 02, 2017

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Samsung 58" plasma pop spark no picture


Hi
A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
This will cure the problem as they overheat being sat next to a heatsink that gets very hot!
Try and change them for the same 3300uf but a higher voltage.
Hope this helps

Jul 02, 2010 | Samsung PN58B650 TV

1 Answer

I have an RCA big screen tv and when I push the power button I can see that it sparks at a splitter box under the bulbs. The tv will not power up


Hello,
first you have to open the back cover of the television to check for bulged capacitors.
A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
This will cure the problem as they overheat being sat next to a heatsink that gets very hot!
Try and change them for the same 3300uf but a higher voltage.
Hope this helps....

Jun 07, 2010 | RCA Televison & Video

2 Answers

My lg 50pc3d will not turn on the power light turns green then red when i press the power button but nothing happens. It all started when i was watching tv on day the picture turned dark gray so i turned...


If there was a loud POP! sound when it turned off then you will have to replace a sustain board.

If there wasn't, then you're more likely facing either a power board or main board replacement. It can;t be said which one of the two based only on the described behavior - can be either.

Mar 13, 2010 | LG 50PC3D 50 in. Plasma Television

1 Answer

While watching the tv, there was a sudden loud, sharp pop, sounding like a gun shot, and the picture went blank


Sounds like either something went pop on the main pcb or in the power supply. Will need a repairman to take a look. & Just a caution if you're feeling adventurous, don't do it yourself unless you know what you're doing!!

May 01, 2009 | Televison & Video

2 Answers

Magnavox 37MF231D 37" LCD TV "popped" now won't turn on at all!


Capacitors tend to pop when they fail. Phillips LCD TVs have lots of problems with capacitor failures in their power supplies. I've got my 37mf231d apart on my workbench as we speak. Mine makes a whistling sound which I believe is either a solder fault or a bad capacitor.

A new power supply board is about $150 for that TV. The gamble, of course, is if the power supply took out something else when it failed.

Jan 16, 2009 | Philips 37MF231D 37 in. LCD Television

1 Answer

Gateway GTW-P42M102, first sparks, now flashing green lt. in back


The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Jun 21, 2017 | Gateway GTW-P42M303 42 in. Plasma...

1 Answer

Big POP no sound no picture


if you could see light orange or green is has power is probably teh Y and Z board

Aug 22, 2008 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

No Picutre


someone shot your tv.





no really, I am just a smart a$$ --- but the loud pop sounds like it may have been one of the capacitors in the power supply board. check for a POPPED cap (rare) and if there is one, test the components in the related circuit - as SOMETHING had to happen to make a cap fail like that - maybe a voltage regulator? give it a look..

Jul 25, 2008 | Sony KP-48S35 48" Rear Projection...

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