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If the power supply circuit board look like have been overheated and leave brown spot on the board that mean the board is dead

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Search ebay for another power supply board.........
cheers

Posted on Apr 10, 2011

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I have a Polaroid TV FLM-373B it was dead replaced the power board now I have picture and sound. But I still have a dark spot center lower screen. Is this a T-con board problem??


Sounds like back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Sep 16, 2016 | Polaroid Televison & Video

2 Answers

WE HAD A LIGHTING STORM AND I HAVE NO LIGHTS ON MY BRAVIA WILL NOT TURN ON IS THERE A BREAKER OR FUSE TO LOOK FOR


There is a fuse in the tv power supply board,a fuse it is located near the a/c socket plug in of the tv power supply board.Lighting storm pack a huge anount of power and magnatic static field.If ur tv was in that path.U will not fixed it with a new fuse the tv whole power board probally dead already and those other circuit boards on the tv might be dead too.Good look with the replacement of the fuse,maricles might happen ur tv just have a dead fuse only.Not must take to or call many tvs shops and get the best estamates prices to fixed the tv.Not a do it self project,if tv a got hit by a massive power surges.

Aug 11, 2011 | Sony BRAVIA KDL-46V3000 Television

1 Answer

My LG LCD TV will turn off by itself. I will unplug it and leave it for about 1o Min, plug it back in and it will work fine.The TV will sometimes work for days before this proble reoccur


Hello,

You need to check the output voltages of the power supply to see which one goes off. It may be due to short circuits some where, if otherwise
Your power supply board is dead, you know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Take care......

May 06, 2011 | Sanyo Televison & Video

1 Answer

Toshiba 50hpx95 made popping noise then went black, now power light is blinking red. wont turn on


Hi, It sounds like you have an electrolytic capacitor that blew up( can be a bit noisy ) it'll more than likely be in the power supply section somewhere-it's not totally dead hence the blinking light ( which is a fault indication ) The bad component should be visible by possible signs of swelling on the top,( silver colored) a rubber seal on bottom being pushed down around the two metal leads near the circuit board , or even some brown discoloration around the faulty component/s,( it does not have to be a capacitor) I have heard integrated circuits pop before ( they will almost always leave a smoke stain near where it occurred ) also there may actually be a small hole in the faulty part. I hope this helps, Make sure unit is unplugged before servicing, good luck, Prodzilla

Mar 31, 2011 | Toshiba 50HP66 50 in. Plasma Television

1 Answer

House took lighting strike and my LCD TV will not power up. Have TV apart and the fuse is good. Heat sinks are warming up and do not see any burnt spots or blown capacitors.


All the ICS on the boards are dead.Replaced the power supply board,it dead.Be prepare to replaced the Tuner board too.50% it dead also.Tries websites like Shopjimmy.com,Ebay.com to buy refurbishes boards like the power supply board and the Tuner board.

Sep 30, 2010 | Philips Televison & Video

2 Answers

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

2 Answers

The red standby light is flashing and i cant turn the tv on


Ur power supply board is dead.U know basic electronic's and soldering?Most of the times,the power suppply board just have dead leakages gases capacitors.These capacitors alway bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get ur tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole rerfurbish power supply board for the replacement.

May 07, 2010 | LG 42LC2D 42 in. LCD HDTV

2 Answers

Same prob. Tach and odometer dead. will come on intermittently


Hi,

I had a similar issue but the issue is not related to connections. There are many steps involved with this, but it is related to two transiters on the circuit board that have overheated the connection for the odometer and the tachometer. To complete this job, I did it with a $17 soder gun and $3 worth of tin solder.

Anyways, I got it to work after this.

You need to unplug the battery, take off the radio panel, the dash, unscrew the speedometer casing from being held on, take off the back, unscrew about 15 screws, unplug the gauges from the computer, then take out the circuit board. There should be two blue transitters very close together and between them, a small nub that has likely worn away. Also on the other side of the board, a browned spot likely exists. Each of the transitters will need new solder.

This link that I followed will fix the issue.

http://members.cox.net/dpeters30/97_sebring_dash.htm

Sep 13, 2009 | 1997 Chrysler Sebring

1 Answer

Samsung TV Turns off after a few seconds red and green light flas


You are going to have to troubleshoot all the boards in the television until you find the problem. Start with power supply board. This part usually goes bad due to overheating and faulty components. You must check for brown spots on the boards , that are signs of overheating. Look for bad components like bulging capacitors and burnt resistors.Look for bad connections, like cold solder joints. you must be very careful working on the power supply board as it does have high voltages they can be very dangerous to the inexperienced user. Never test anything with the power on or connected.Use anti static protection straps and gloves around all the chips and microprocessors to avoid damaging them. Check all the other boards for the same problems. If you can find no problems, Then it is time to get help from a service center where they will have all the necessary testing equipment, To give the unit a more thorough testing for faulty components.Hope this helps you with your problem.

May 17, 2009 | Samsung DLP HL-P5663W 56" TV

2 Answers

LCDTV turns itself on and off


You could order a power supply yourself and install it, but if the tech on the phone was wrong it would cost you a lot. Better to at least inspect it yourself.
If you are not familiar with electronics it could be tough to pin down the fault. Over-the-phone diagnoses are really only 50"50.

It COULD be any of the following:

Power Board
Main Board
Control Board
Control Board Wiring Harness
IR Receiver Board and or harness.

Visually inspect the power board for any capacitors that are vented or have shrunk cases on them. Check it for brown spots on the board itself. If there are brown spots you may have an overheating component. If it's s discrete component like a resistoror diode you can replace it. If it's an IC, you may have trouble finding it and might end up replacing the whole supply.

On the main board you can check all the connectors to make sure they are plugged in all the way. Make sure there are no overheating components.

On either of these boards, if you find dark brown spots you might want to consider replacing that board.

You can replace any bad capacitors you find easy enough.

Our shop would charge $75 labour and the cost of the part for a repair like this. A few hundred dollars for a circuit board is not unusual.

Oct 10, 2007 | ViewSonic N2750w 27 in. HD-Ready LCD...

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