370/12RM battery drain

[casinoman]

Recently, the battery on my McGuinn keeps discharging although neither a cable is plugged in, nor the rotary switch is set on any of the "active" settings. Anyone has had the same problem?

[loverickbass]

Sounds like you've got some corrosion built up in it somewhere, making a circuit.

[iiipopes]

Sounds like you've got some corrosion built up in it somewhere, making a circuit.

Yes. Check especially the jack fingers to make sure they are "breaking" open when you withdraw the cord.

[8mileshigh]

Yep. I had this problem too. It was the jack fingers touching.