[mythtv-users] MythBox unstable when next to stereo/TV

[Mike Grusin]

Ideally, you'll want to plug everything in the home entertainment center
(TV, CPU, stereo, etc.) into the SAME outlet.  A power strip is a good way
to do this.  You won't overload the outlet/circuit unless you're pulling >
1000W.  I didn't catch your location, but here in the U.S. most homes are
supplied with 240V which is split into two 120V legs.  Some plugs are on one
leg, some on the other.  If some of the equipment is plugged into one phase,
and some on the other, you can have severe interference between those units
when they're connected together.  So keep em' all on the same outlet if you
can.

If that doesn't do it, try this, but only as a last resort as it is
potentially unsafe.  Plug the power strip from the above step into a
three-prong to two-prong adapter, and plug that into the wall.  This
disconnects the ground wire.  If things work better, there's a possibility
that the outlet is miswired, and you should have it fixed rather than rely
on the disconnected ground (it's not required for operation but is there for
safety reasons).

Hope this helps, good luck! -Mike G.