Electrical Noise

A filtered extention strip for each, separately might solve most of your problems. Additionally, you can buy clamp-on ferrite suppressors. Put them on on EVERY wire, power or signal until satisfactory.

By the way, a properly built computer power supply does not supposed to do that.

Hello yksyoung

Your say your Fax machine is "Noisy".

Please advise the type of noise.

1. Mechanical - from the Fax machine
2. Electrical mains "hum" on the phone line
3. Other - please specify.
   

If your Fax Machine is a new unit, it is possible that it is faulty.

The electrical "hash noise" is probably coming from your Computer, and if so, you can purchase a small mains filter unit to do the job, insert into the Computer/Monitor power mains line.

A Computer, if properly made, should not radiate "electronic noise" which interferes with other equipment.

Ensure the Computer and Monitor "Grounding or 'earth'" wires are properly connected, to minimise RFI (Radio Frequency Interference) radiation.

Advise your progress, here, thanks.

Kind Regards....

I suggest adding noise filter in-between socket and machine, it's a easy and cheap solution, ask for a 230Vac - 1000W filter(oversized), it's goign to be less that 10 $

try plugging it into a different outlet on a different circuit