I am using a Dell Precision 5520 Laptop that is in my home studio. When the computer is on and connected to its power supply all of my guitar amplifiers pick up some sort of interference that sounds like random pops and buzzes.The amplifiers are all in the same room as the laptop and are all on the same electrical circuit. It is pretty quiet (you can’t hear it when you are playing) but it is on all my amps (tube and solid state). The powered monitor speakers connected to a UR44 does not pick up the noise. I am pretty sure its the computer power supply because when you unplug it (running computer on battery only) or when the computer is turned off the noise does not occur. Any ideas on how to cure this problem? The power supply is usually plugged into a power surge bar. I tried it on a battery-operated UPS and that didn’t help.
Thanks for any help you can offer!