GE 105020a stack system has a loud hum in both speakers when the unit is OFF. How do I fix this?

Filter capacitors in the amplifier or a broken ground (shield) wire. Check if there is a ground lift switch in your system and try it in both on and lift positions.

Katary, first it sounds like it is a bad drain pump. to access drain pump you need to remove the front panel, to remove the front panel there are 2 screws at the very bottom of the front panel near each corner. Once removed the bottom pulls out and the panel will lift up 90 degrees before being able to be removed from the top "hinge" point. Once removed you will see 2 large rubber hoses, 1 short and 1 long, in between the two is your electric drain pump. It should be on and "humming" during the spin cycle. appliancepartspros.com have that pump for $106.00

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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.

Is the hum there with NO input cables connected? If not, you have bad cabling. Make sure you use only XLR to XLR mic cables and not the junky ones with a 1/4 inch plug that are for Karaoke machines. These devices usually use switching power supplies and do not have the power supply originating hum of older equipment. If the volume control adjusts the hum, then the hum originates previous to the control which is either in the preamps or the external inputs.

Hello Kchoffman73,

It sems we developed the same problem.
The hum seems to be coming from the bottom rear of the
fridge.

we have a GE side-by-side model TFX25JR.
The fridge is about 12 years old.

Whats the status of your fridge ? Did it ever stop
humming ? Did you replace or repair it ?
Does it still work ?

Thanks

With the details you described, the high voltage diode might be shorted( usually HVR 1X). It is connected from the Capacitor and the chassis, or else the capacitor is the one at fault,but not common .

The hum you hear from the speakers and from the unit itself originate with 60hz AC power. They may not actually be related. Sometimes a transformer will hum slightly and unnoticeably. That you're getting a loud speaker hum says there is an electrical leak or a grounding issue somewhere.

Do all sources produce the hum or, say, just the phono? How about on headphones? Try rotating the AC plug. In those days they weren't keyed with one large blade as they are now.

Disconnect the device (amp or TV) that is feeding the speaker system. Turn on the power and see if there is still a hum. If the hum is no longer present, then the hum is most likely from the source.

If the hum persists, most likely the power supply has failed, or the output section has a short. You should contact the manufacture for support. They will most likely recomend that you give the unit in for service.

Jerry G.

The sound you are discribing is indicative of a short in the audio cable coming from your amp to the woofer. it doesn't mean that you have to replace a cable, but it could mean that one is loose. I would first try to turn on the unit and then start unpluging each speaker from the back one at a time. If the sound stops then you know that the hum is caused by the last speaker cable you pulled out. It is possible that you could make a temporary fix by twisting the cable back and forth where it connects into the back of each speaker. (Though this would only be a temp fix.) Because these cables are hard soldierd into the the actual speaker, there is no way for a person to simply replace the problem cable.

The other possible problem could be with the cables coming from the computer. You might simply have the cables in the wrong inputs. They should be color coordinated. Yellow in yellow, etc. Or with the system on, unplug these cables one at a time to find the problem cable.

If non of these work, I would bring it back to the store for a replacement system if still under warranty.

The hum can be from the power supply not properly filtering, and or the output stage also has a short.

There is the chance that the speaker driver coil is now burned, or the power supply is now dead. If ther output stage is shorted and was putting DC on to the speaker cone, this will burn it very easily.

You should sent the unit out and have it serviced, unless you are properly trained, have the service and engineering manuals, and the test equipment to follow up on a proper repair and calibration.

Jerry G.