Hum and tube glowing red on my Foreplay ll

[Thermioniclife]

You can buy a 2 prong male that has 3 prong female they have a short green wire with a fork connector that you loosen the wall plate mounting screw, slip the fork under the screw and retighten thusly giving a ground to the 3 prong female. there cheap. There sometimes called cheater plugs.

[Paul Joppa]

I don't recall seeing in this thread the question "are all the components plugged into the same outlet?"

If not, give that a try.

[Paul Birkeland]

Do you have any water pipes or gas pipes near your system?  Is your gear plugged into an outlet on an exterior wall? 

[hron61]

Only one outlet is used. Foreplay and amp are plugged into a gfci extension and the cd player is hooked up to a monster cable hts 2500 power conditioner.
TV, soundbar, and cable box,  security system touchpad, and 2 subwoofers are also hooked into the monster conditioner as well.

I tried the cheater plug early on with no luck. Outlets are ungrounded, house is 96 years old.

No water pipes nearby, outlet is mounted to a center interior wall unfortunately.

[Paul Birkeland]

Do you own this house, or is it a rental?  Where the outlet is, do you have access below it? 

If you have a basement below that's relatively open (typical for older houses), it may not be the end of the world to run a ground wire for just that outlet.  Even if it doesn't end up resolving your issue, it's a very good idea to do this anyway.