I have a Bose companion 3 series II and my control pod will only work if the Jack plug is pushed half way in but the sound is distorted if you push the jack plug all the way in you dont get any sound at all

SOURCE: control pod on bose companion 3

try to check the circuit board with an expert

SOURCE: Bose Control Pod won't work

Try changing the plug on the control pod, those plugs are fairly weak and prone to breakage. Does there appear to be any strain at all on the plug itself? if so then that is where I would start. If you have a series 2 then I can help you, or if you can find out if the 2 control pods are the same, that would be fine too, but I have a series 2 system companion 3 and if needed I will cut my cable to trace the wiring and then replace your plug for you. my cost for this would be $40, that includes return shipping with priority mail.

SOURCE: Where Can I purchase a bose companion 5 control pod?

you have to call customer service at 1-800-367-4008.Run about $35.

For the broken cable, have you tried to fabricate a new cable for it?

SOURCE: Loud hum when Bose Companion 3 Series II speakers are turned on.

I had the same problem for many months. I asked a sound & video professional and he suggested I move the subwoofer away from any power source. I had the subwoofer next to my UPS. Once separated and moved all wiring away from the power supply (about 12") the low bass hum was practically gone.

SOURCE: Control Pod for Bose Companion 5 speaker system

I had the same problem right out of the gate, the volume dial on my control pod for my Companion 5 wasn't working, however, the touch pad and LED worked. I called Bose customer service and was instructed to:

First, unplug the power directly at the back of the woofer while the unit was on;

Next, I was instructed to unplug the control pod, visually inspect for any damage/defect;

Finally, re-seat the control pod on the back of the woofer and then lastly plug the power cable back into the woofer.

It worked like a charm. I hope this is helpful!