Question about GPX Boombox BC112B

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The boombox hums when plugged in.

It doesn't matter if the volume is up or down, the unit outs out a loud hum when ever it is plugged in.

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2 Answers

KLH HPS 1100 powered subwoofer. as soon as plugged into AC we get a loud hum from spkr. had unit for 8yrs.


Hum usually indicates a power supply problem. If it has an internal supply you will need someone to check it's producing clean DC. Alternatively if you do open it (beware risk of shock!!) initially visually check condition of /replace any bulging electrolytic capacitors.

Jun 27, 2014 | Audio Players & Recorders

1 Answer

Loud HUM from 1963 Wurlitzer 2710 when plugged in


If you observed a vacuum tube with the symptoms you describe, it requires replacement but there may be other failed components as well.

Dec 27, 2013 | Audio Players & Recorders

1 Answer

Zener diode and hum in guitar amp


It could be the diodes, but whatever is the cause it's before the pre-amp section. Generally a loud hum such as that with no effect by volume control, is mostly caused by the filter capacitor in the power supply. And that hum is the 50HZ mains hum getting into your system!

Feb 26, 2013 | Audio Players & Recorders

1 Answer

Benwin 5.1 surround sound system Humming loudly without anything pluged into it!!!


It is sad your having a problem with your
Benwin 5.1 surround sound system
If humming can be heard on all speakers, then it could probably

be on the power supply.


If it is only on the main SUB unit, then it could be the amp itself.

But check for power supply capacitors that supplies voltages to the

amps.Check for amp output DC voltages too.

Oct 04, 2012 | Audio Players & Recorders

1 Answer

The tv hums, you can turn the volum down to zero znd the tv hums to loud


You have a Bad Color Wheel,that is what is causing loud humming sound.
Encompass Parts Distribution 1-800-638-3328
Samsung Parts 1-800-627-4368

Color Wheel is Located Behind Lamp ,Pull Lamp out and with a Flash Light Look inside you should see Color Wheel. Color wheel spins 9,000 rpms per second

Apr 12, 2011 | Samsung HLS4676S Television

1 Answer

Our KitchenAid microwave works well, heats food, etc., but makes a constant loud and annoying humming noise (close in frequency and tone to the hum of cold fluorescent tubes) even when not in use. When...


hi it could be a bad neutral connection on your plug or inside on your high voltage transformer check the plug for burning and try plugging it in a different socket

Mar 17, 2011 | KitchenAid KHMS155LSS 1000 Watts Microwave...

1 Answer

Motor making loud humming noises and kicks out. Could this be a capacitor on the motor going bad ? This doesn"t happen all the time, but frequency is increasing.


this is the motor overheating and, the overload shutting down the motor: check to see if the motor belt is binding

Jan 23, 2010 | Washing Machines

1 Answer

Loud hHum from Subwoofer


Sounds like the hum might be mains hum caused by the failure of the power supply capacitor(s) in the sub. It/they will be the largest on the pc board. You will find all the details (needed to replace it) on them. If you find more than one replace both.

Dec 10, 2009 | Audio Players & Recorders

2 Answers

LOUD BUZZING/HUMMING SOUND- CAN HEAR OVER AUDIO


have someone check speaker ground to the TV chassis. Your speakers are picking up reverb from the Video Signal.

Aug 19, 2009 | Vizio L37 Television

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