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Can we replace the main power supply or is it dangerous for someone who isn't a tv tech to do it

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Just make sure the TV is turned off and be careful when you grab the board because it can happen that something will still have a charge. Grab it by a heat sink or something like that. You have a higher chance of getting shocked if you grab the back of the board

Posted on Sep 09, 2010

Testimonial: "Thanks for the info. Will remember that when replacing."


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My tv click and then shuts off

Could be the power supply, but it would be dangerous to open the TV, if you don't have the skills. Remember the power supply gets its power from the mains. These voltages can be deadly.
Please contact a skilled to certified repair engineer.

Jun 16, 2014 | Televison & Video

1 Answer

Signal Problem


When the sound is working and the picture is not it indicates the main power supplies are working but the picture supply is not. The picture supply that powers the projection tubes is a high voltage generator and is very expensive to repair. Not even most tv techs now how to troubleshoot them. So, I cannot recommend you repair it yourself unless you are a trained high voltage tech.

The cost of repair - my wild guess - would be around $300. However, the real cost can only be determined by someone who can make an accurate diagnosis - which will require a hands-on approach the problem.

If you have any other problem please ask me..
Please don't forget to rate me as fixya..

Feb 09, 2008 | Televison & Video

1 Answer

No power for AKAI PT5250A

This is a main power regulator board fault. Check it. If you are not handy with high-voltage circuit board repair, ever attempt to continue, because, some capacitors at the power supply regulator board are dangerous to touch, even after you have unplugged the TV from AC mains supply line. They will have storage charge, that you could suffer by severe electric shock.

May 28, 2013 | Akai PT5250A Television

1 Answer

Dynex 47

This is exactly why I tell people that when your set isn't working, you have to have it properly diagnosed. Chances are you have a defective main board. The power indication is an indication that you have standby power. However, the power indicator is controlled by the main board. So it is likely that your power supply is fine but you have an issue with your main board. It is not likely that your replacement power supply is defective as well, but anything is possible. You will need to have the power supply tested. If you are handy with a multimeter, I can help you with that.

Sep 03, 2012 | Televison & Video

1 Answer

Vizio M261VP 26'' LCD TV no picture, logo does not light up

If the Vizio logo(power indicator) isn't coming on when the set is plugged in, most likely you have a issue with the power supply. Your standby power supply isn't working, and without it, you will have a dead set.

May 12, 2012 | Vizio M261VP 26" LCD TV

1 Answer

I want to know what is the problem with my tv because why it does not turn on

Have you tryed the remote? the power button on the tv could be bad
Could be a fuse, or power strip if your useing one,,

If not the power supply may need to be worked on,, Sorry to say if its not something small, it could cost more then its worth to fix,,

If you know someone that will help you[if needed] open it up and check the main and secondary fuses on the power supply,, the board the power plug go's to..

Opening a tv can be varry dangerous!! tuch the wrong thing and your on your way to the hospital or worse..

I cant strees the fact enough to be safe,, make sure you or your help know what not to tuch, or how to discharag the TV first!!

Nov 28, 2009 | Sony Grand WEGA KF-50WE620 Television

1 Answer

Set cuts off after 20 minutes. Power Supply Board gets hot.

hi there,

Looking at your description, i would suggest keeping that TV turned off, it could be Potentially dangerous, sounds like there are some electronics inside the TV's main power input that are faulty and causing shorts in the internal circuitry which is what is causing the overheating, the overheating is due to the electrical currents and the damage to the board.

i would suggest calling Haier Tech support and attempting to solve the problem over the phone with either a repair/replacement.

if that fails, i would definately suggest getting the TV repaired some how, having unsafe electrics in the house is dangerous, take care !

Oct 28, 2008 | Haier HLH406BB 40 in. LCD HDTV

1 Answer

Sony KV-29-SN21 TV power supply clicks, no picture no sound

DO NOT PUT ON TV As it is DANGEROUS call tv tech to check high output in regulated power supply

Sep 16, 2007 | Televison & Video

2 Answers

Power Supply?

Ok thats great news. Just please dont be alone in the place where you repair this set. So someone can call 911 when you get knocked on your $%$#.. LOL Now that being said and all kidding aside. Zenith TV sets are made for the entire Printed circuit board to be replaced as a whole. Contact and click on technical assistance and then find board by model and enter your model #. If the board doesent come up call them the #s there. You see I cant teach you what parts to replace in an e-mail message. It takes years of practical experience, and the proper equipment to repair an electronic device down to componet level. You will be better off to get the entire board with this Zenith and replace the PC board as it was designed for you to do. Now after you replace this board, there will be a few adjustment you will need to do like screen, focus, as well as modst likly on screen service menu as well, all depense on how well they serviced thios module. They can assist you with this as well. Good luck.

Aug 09, 2006 | Zenith Z27H96R 27" TV

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