Unplug the laptop from house current and just run on its battery. If you no longer get the buzzing from the amp that way replace the laptop's power adapter.
That does it - thanks, you;ve ended my frustration. It went in for repair recently, and came back with a new power supply that is clearly not the correct one. Works now on battery but as soon as I plug in the power supply the buzzing starts and overpowers any sound. At least I can practice for an hour !!
With my own amp I have it plugged into a 3 prong to 2 prong adapter from the hardware store. Naturally I cannot recommend that to anyone else because it defeats the ground which is a safety feature.
Jim Coates
4 Operator
•
13.6K Posts
1
October 9th, 2012 13:00
Unplug the laptop from house current and just run on its battery. If you no longer get the buzzing from the amp that way replace the laptop's power adapter.
lespaulthrougha
2 Posts
0
October 9th, 2012 15:00
That does it - thanks, you;ve ended my frustration. It went in for repair recently, and came back with a new power supply that is clearly not the correct one. Works now on battery but as soon as I plug in the power supply the buzzing starts and overpowers any sound. At least I can practice for an hour !!
Jim Coates
4 Operator
•
13.6K Posts
0
October 9th, 2012 16:00
With my own amp I have it plugged into a 3 prong to 2 prong adapter from the hardware store. Naturally I cannot recommend that to anyone else because it defeats the ground which is a safety feature.