Peter and others,

The problem with most laptops is the power supplies, which at best are awful. The solution to eliminating the problems is a ground defeater, which cost under $1. I have recommended this to a number of performers, and every one of them has reported 100 percent success in eliminating the noise problems.

Cheers,

Gary

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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)