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TV Capacitors How do you discharge a TV capacitor?

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Get a 10K resistor, use an alligator clip to connect one side of the resistor to the ground of the TV (note, if you are working in the primary circuit of a switching power supply, do not use chassis ground, instead connect the alligator clip to the negitive side of the capacitor).
Use a good pair of insolated pliers to hold the body of the resistor and touch the free end of the resistor to the positive side of the capacitor.
Because of the 10K resistor it may take a minute to fully discharge. Heep holding it for at least a minute.
If you have a Voltage meter you can use it to verify the discharged state of the capacitor. (note you can get a multimeter for as little as $10 if you look around).

Posted on Nov 04, 2008


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What capacitors should I replace on a Mitsubishi WD-y657 DLP tv that has the blinking timer light error?

Without a schematic, I would check and replace any capacitor that either smells like it burnt out, or is physically damaged (just by looking at it); or if the top of the capacitor is bulging- all signs of defects. Please be careful when working with capacitors especially hi-voltage. Make sure you disconnect the tv from the outlet before servicing it; and properly discharge the hi-voltage capacitors. Plenty of youtube videos on how to do so. Failure to properly discharge capacitors will be lethal if mishandled during the troubleshooting process. Good luck on your project!

Feb 12, 2017 | Mitsubishi Televison & Video

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Why does my Philips TV randomly turn off and back on?

I think some of the capacitors at Tv power supply are faulty. By doing what Philips suggested, you actualy try to discharge capacitors. This trick could work, if capacitors would be fine. Your tv needs to be checked by service.

Nov 20, 2014 | Philips Televison & Video

1 Answer

Old Magnavox television - will not switch on

The problem could be the capacitors to the power supply. WARNING: capacitors carry very high voltages that can shock and kill. I don't know what your skill level is: you would have to 1.) disconnect the power cord from the wall outlet and remove the TV's casement, exposing the internal electronic components. Although lower voltage capacitors will drain and discharge their stored electrical energy over time; larger voltage capacitors (not to be confused with the physical size of a capacitor) do not.
You would have to either discharge all the capacitors using a resistor (3 watts or greater) or by shorting out the legs of the capacitor using an insulated screwdriver rated for high voltages.
To make sure that the capacitors were properly discharged, verify the process using an ohm meter. There are a slew of YOUTUBE videos basics on capacitors; how to identify a bad capacitor; how to discharge a capacitor safely; how to de-solder components and perform re-work soldering. If you need more help I'm happy to oblige. Best wishes, I hope my comments were helpful.

Mar 07, 2014 | Televison & Video

1 Answer

TV no longer powering up. Red power light blinks 10 times, stops, then repeats. Tried holding down the power button, turning off the tv for a while, plugging directly into wall instead of surge...

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board

Jun 28, 2011 | Panasonic Viera TH-46PZ85U Plasma TV

1 Answer

I bought a runco pl42c and the green light comes on and then clicks off and the red light comes on... Is there anything special needed to get this tv to work?

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

Jun 26, 2011 | Televison & Video

1 Answer

Hi i have a ilo 32" tv, it powers on for 1 second and then picture goes black and the power button continues on, how can i fix it?

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

Jun 12, 2011 | iLO 3200 32 in. LCD Television

1 Answer

Turns off after being on for 2 mins.

Had a fair bit of experience with these

Normally the Electrolytic capacitors in the SMPS dry out.
and when you power up the tv after a while the cap gives up dropping a supply rail causing supply to shutdown turning off tv.

2 ways of fixing this:

1. Take to Local Service Agent or electronics repair shop and explain that its the capacitors (they won't think your dumb and charge you heaps!)

2. If your feeling confident power down and disconnect from wall power..
leave for a hour or so to let the main capacitors discharge.

next take off the back cover and have a look for the SMPS PCB
it should be dead centre on the back of the screen and have large heatsinks onboard..(Aluminium fin looking things).

now scan the board for any faulty capacitors. and good capacitor looks like:
A Faulty Capacitor looks like but not limited to:
You'll notice that the good capacitors are flat topped and clean
any bad capacitors will have bluged tops or there insides hanging out!
then all you need to do is de-solder and replace with new capacitors.
whole job should take about 4 hours for a beginner and about $10 worth of capacitors

hope this helps,ben

Jan 04, 2011 | Polaroid TLA-01911C TV

1 Answer

Very poor sound quality

After installing parts on a board some tv's require that you reset some values on the tv's servicing software. This software is only available to certified techs but you can search the net to try and find it. the caps that were replaced should be of exact value in 3 criteria:

1 Voltage
2 micro farads
3 temperature

Also a note of safety:

There are HIGH VOLTAGE circuits inside your tv that could inflict serious harm even when its unplugged if approached wrong. There should be warning stickers all over the chassis of the tv informing you of the danger that your exposed too. When you take out the primary power supply discharge all high voltage capacitors to cancel the harmful charge they are holding. Especially if you just turned the tv off.

Discharging HIGH VOLTAGE capacitors:
use a high wattage resistor of about 5 to 50 ohms/V of the working voltage of the capacitor. If you don't discharge the capacitors or replace caps with inaccurate values you could easily damage other sensitive circuits.

Try resetting the tv back to manufacturers specs and see if this produces better audio quality. And when ever your working on any circuit board be sure that you are well grounded. This will prevent ESD (electro static discharge) which can harm other circuits especially logic circuits. This will cause an imbalance in circuit operation and result in a non working tv eventually.

Dec 19, 2008 | Polaroid FLM-2601 Television

1 Answer

Toshiba 57 H81

The problem sounds like the capacitors in the horizontal circuit. Replacing these capacitors will require knowlege in using a soldering iron and discharging capacitors. A capacitor is a device that will hold a DC voltage charge (direct current) If not discharged properly they will hold the charge and you could wind up being the path in which they discharge. This discharge can and usually does hurt. Also TV's do have lethal voltages in them and if not careful you could wind up in real trouble. After you discharge the caps, unsolder them you need to be sure to put the new ones in the proper way as they are going to be electrolytic capacitors and need to be put in properly (or they will blow up... trust me!!) After installed, the capacitors should be charged back up slowly. This is done by hooking the TV to a variac and power being brought up slowly when the TV is turned on. Some techs don't do this process but should be done to protect the new capacitors. After all this, you may have to tune the horizontal circuits again since the new caps could make the circuit no longer in tune. Not a common issue but may still be a issue. Anyway, you should be able to find a reputable repair shop who would do this job for about $100.00 If you still want to do this repair yourself, you can get the manuals needed at You can order the capacitors from,,, or a local electronics part store. A reputable repair shop should also warrant their work. For example, my company offers 30 days after repair on what we do. This way you have a little insurance on the repair job.

Feb 12, 2008 | Toshiba 57H81 57" Rear Projection...

2 Answers

Gold Star GWHD5000 capacitors.

If all your doing is washing it out and fixing bent fins it's not necessary to discharge the capacitors. I would only discharge them if I was disassembling it to the point that the capacitors were out in the open or there was a change I could touch the wires on them. To discharge any capacitor is pretty simple really, first make sure the airconditioner is UNPLUGGED , then using two screwdrivers, make sure that you are holding onto the INSULATED HANDLES ONLY, put the tips of the screwdrivers on the terminal connectors on the capacitor and cross the screwdrivers. Sometimes, depending on the capacitor, it is possible to do this with only one screwdriver by shorting across the terminals with the shank of the screwdriver. Just make sure the A/C is UNPLUGGED and you are holding onto the handle ONLY.

Feb 07, 2008 | LG Goldstar GWHD5000 wall/window Air...

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