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The TV turns on but there is an electric hum and I can see a glowing toroid wrapped in wire inside the rear case of the tv.

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I would say that you have a short circuit in the main power supply and a feed resister is just about to expire.
Not knowing the make or model of the TV, I can advise you no more but don't try and use it as it sounds dangerous to me!

Posted on Nov 14, 2010

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Posted on Jan 02, 2017

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2 Answers

Have a humming noise in both of the speakers


Something's crossed, keep power lines and sound lines seporated double check wires in and out u could have bad sound wires and if so of home just buy new for a car get the RCA lines with a built in ground.

Aug 07, 2014 | Toymax Magnavox 37MF231D 37 in. LCD TV

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My tv won't stop humming. I have only had the tv for 2 months


make sure you have it and the other electronics plugged into a surge protector strip and all cables wires & connections are fully seated (fully plugged in).The problem is in how the electrical current is being received and it is manifesting the humming sound / " GOD BLESS "

Apr 08, 2013 | Televison & Video

1 Answer

When i turned on my Hc-p4241w i smelled a burning smell then the color started looking 3d, i took a flashlight & looked through the left side of the tv and saw a orange glowing inside and i shut the tv...


Your Convergence output is burnt.DONT turn that TV on until convergence IC's are replaced,orange glowing inside that you see it is resistors that overheating and burning.Unplug TV from outlet before more damage is done

Aug 23, 2011 | Samsung HC-P4241W 42" Rear Projection...

1 Answer

My midland 1001z has power to it but all it does is give a humming sound!The mic. will key up and the tx light comes on but when I release the mic. the humming sound gets louder,is the unit screwed? thks...


If you are using a power supply. Get you a better power supply(full filtered) RADIO SHACK has many 12 volt 3 amp models. Run power wires away from radio about 10 feet away to eliminate hum. AM does hum when its near power lines, household appliances. Keep it away from TV's etc. Turn off TV then listen to it. Make sure you have good outdoor antenna like Antron A99 18ft. Fiberglass on Tv pole or Tower. If its inside car --its the engine. you need a Radio Shack Power filter. A coil of wire wrapped around a core and big capacitor on the (+) side shunted to ground by a 470uf Capacitor. Turn off engine then listen.

Apr 04, 2011 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

I have an RCA rear projection TV MOD: D52W19B SER: E315C30GD Chassis: ITC222. The flyback arcs when power is applied, several days ago the TV was operational, a loud pop emitted from TV, I unplugged it and...


yes it is a flyback transfomer is a very sensitive piece of equipment also known as a lot or lopt in you case i would say that the case has cracked on your flyback you may get by however if the damage inside is not significant yet be wrapping the flyback transformer in black electricians tape but this should not be a permanent solution

Jan 22, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Humming sound comes and goes. you can turn off the vol. and you can still hear it. picture is fine.


More often than not humming and buzzing through your speakers is caused by a grounding problem. There are three main ground problems that cause problems in an audio / video system. These are ground loops, improper grounding and lack of a ground altogether. The other possible culprits that can cause noise are bad cables, a faulty piece of equipment or electrical noise from a lighting dimmer or electric motor. There are steps you can take to troubleshoot the noise and eliminate it from your theater or entertainment system.
The first step to is to find out where it is coming from. Disconnect your source and display equipment from your receiver or surround sound processor. If the noise stops, connect them back to the receiver or processor on at a time until the noise returns. When the hum comes back, you found where the noise is entering your system. Note that if you are connecting remote equipment, such as running the signal from your theater room DVD player to the TV in the bedroom, your chances to pick up noise increase dramatically. With such long runs, noise can be induced into the long cable runs from adjacent electrical wiring. It is also easy to create a ground loop, because the equipment is plugged into two different, widely separated outlets, on different electrical circuits.
If the noise is caused by a cable box, the noise is likely caused by the cable TV ground. To test this theory, disconnect the incoming cable TV feed to the rear of the cable box or TV while they are still connected to the rest of the system. If the noise is eliminated by disconnecting the TV cable , the problem is the cable TV ground. You can electrically decouple the cable TV feed from your system with a ground breaking transformer. These are available from many sources. Be advised that many newer, digital cable TV systems require any device in the signal chain to pass a full 1,000 Mhz. Some of the older ground break transformers will not do this. Be sure to check the specifications of whatever device you are purchasing to verify it will pass the digital cable TV signal.
If the noise is from your projector, TV, or monitor, it is most likely caused because the video display device is plugged into a different outlet than the other a/v equipment. It could be on a different circuit as well. These circuits may have two different ground potentials. That is, the resistance to ground is different on each circuit. A difference in resistance to ground from one ground point to another can cause the dreaded ground loop. If you get a ground loop, current flows between the two components. If the current flows through the components internal audio signal ground, you will get a hum.
You can use an isolation transformer, similar to the type used for cable TV ground problems, to eliminate the electrical connection from one component to the other. These transformers are inserted in line with the audio signal connection between the two components. If there is no audio connection between the components, the problem may be current flowing through the video portion. In this case, a video isolation transformer should be used to eliminate the ground loop.
Sometimes power conditioners will stop noise problems by placing equipment on different, electrically isolated outlets. This is done using isolation transformers. This can be ineffective however, due to the differences in internal construction of different power conditioning equipment. Some safety regulations, such as UL 1950, specify that an isolation transformer is only allowed to isolate the hot and neutral wires; the grounding wire must be passed straight through. If this is the case, the ground loop problem may still exist because many communication circuits are connected to the grounding conductor and not the neutral. In this case, the isolation transformer, or any power conditioner or UPS with an isolation transformer will have absolutely no affect on the grounding problem.
The noise may be generated externally, from a dimmer or refrigerator compressor for example, and coming in through the main power input on the audio video equipment . In this case, a high quality power conditioner may be effective in reducing or eliminating the noise problem. You may also find that one of the signal interconnecting cables in your system is faulty. This can also cause noise problems. Check for this by swapping the cables with one that you know to be good.
You can solve most noise problems in your home theater or multi room audio/video system by taking the systematic, step-by-step approach. Work your way up the signal chain, eliminating each piece of equipment as you go. If you have nothing connected to your speakers except the speaker wiring, and they still hum, the problem is noise induced into the speaker wiring from adjacent power cables. Other than that case, most problems are caused by ground problems, which you can find, and solve, if you take it one step at a time. Hope this helps. Let me know if I can help you with anything else.
JimmyC

Oct 04, 2009 | RCA TruFlat 27F520T 27" TV

1 Answer

MY NEW SAMSUNG LN32A550 TV HAS A HUM FROM THE SPEAKERS


In most cases it's the Cable issue. Either bad Cable Box or the Wires are not grounded properly. Disconnect the Audio Cables or the COAX cable from the Cable Box and see if the Humming noise goes away.

Jan 31, 2009 | Samsung LN32A550 32 in. LCD TV

1 Answer

My tv make a noise that will turn on but within 3 second shot off


I wrapped electrical tape around the transformer in the back, that stops the sparks, don't ask me how is that so. I just thought, the elect. tape would prevent the static from traveling to any other parts of the circuit inside of the tv. Don't try it if you think it's not going to work. It is dangerous and I got zapped 2 times before I got it right. be careful

Jan 18, 2009 | RCA D52W19 52" Rear Projection Television

1 Answer

Can i put my tv on input without the remote


If your tv's front panel isn't working at all and the remote isn't either, then there is a simple fix. The only thing is that you will only be able to control your tv with the remote only. You can disconnect pin 4 at the connector of P001B on the front control panel circuit board. That will disconnect all the tack switches but allow the use of remote. First take your tv rear case off (there is 3 small torx head screws on the rear input/output panel, remove these first. Then there is two torx head screws on the left, top, and right side of the case facing rearward and connecting the black rear portion to the front silver portion). Once the rear case is off, there will be the front control panel circuit board attached in the front of the tv that needs to be unscrewed. Once unscrewed you can see all the connections labeled with eithers words or numbers. On the P001B connector on the front panel circuit board, there will be a 1 on one side and a 5 on the other. The pin 4 is naturally directly to the left of the 5 pin. There will be a bundle of wires leading from the front control panel to the main board of the tv which is on the bottom of the tv. Disconnect this from the main board. Then follow the #4 pin wire all the way from the front panel circuit board, to the connector end that you disconnected (This will be easy b/c they are in a flat bundle side by side). Then just completely remove only the #4 pin connector wire from the connector end. Wrap the end in electrical tape, plug the connector end back into the main board, and put the tv back together and it should work fine with the remote only (the front panel buttons will no longer work).

Nov 28, 2008 | RCA 27F530T 27" TV

1 Answer

Tv makes humming noise when on. how can I eliminate or reduce the nose?


Some of the larger TV's are DISH ready, meaning that they have the tuner inside for SAT TV. The SAT tuners often have an internal fan that makes a humming noise. If it sounds like something other than that, you might have a bad component in your sound circuit that allows 60 HZ hum through the speakers.


If it is a rear projection LCG TV it has a fan in it to cool the bulb. You will hear the fan if you listen closely. It usually cannot be heard over the volume.


The fluorescent bulb and electronics inside make humming sound naturally. Kinda like when you turn on a lamp, and some lamps make a low humming sound.

Apr 03, 2008 | Televison & Video

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