Hi Joe, On the 2113 (and I guess from your description the 2117) the capacitor is directly across the terminals on the mains input socket - i.e. on the 'always hot' side of the on/off switch. So turning the power off behind the front panel of the computer won't help.

In order to effectively control interference the capacitor has to be mounted as close to the point at which mains enters the equipment enclosure as possible. Mounting it further away causes the input leads to act like an antenna inside the enclosure. Yep, this is the only way to shut the power off to this capacitor, it is always live when the equipment is plugged into a live mains socket. A good reason NOT to leave this sort of equipment plugged in but turned off! Peter Brown

Hi Joe, On the 2113 (and I guess from your description the 2117) the capacitor is directly across the terminals on the mains input socket - i.e. on the 'always hot' side of the on/off switch. So turning the power off behind the front panel of the computer won't help. In order to effectively control interference the capacitor has to be mounted as close to the point at which mains enters the equipment enclosure as possible. Mounting it further away causes the input leads to act like an antenna inside the enclosure. Yep, this is the only way to shut the power off to this capacitor, it is always live when the equipment is plugged into a live mains socket. A good reason NOT to leave this sort of equipment plugged in but turned off! Peter Brown