[PD] power supply problem on laptop

[TimBlechmann at gmx.net]

hi,

i've got some problems connecting my laptop (acer aspire) with an amp: 
if i am using the power supply i am getting noises on the sound cards. both
on the onboard and on the m-audio quattro. i searched the list archive and
tried out some hints like putting tape over the ground pins and so on. without
success.

i thought about the following possibilities:
1. a new (better) power supply

2. "cleaning" the power supply with some huge condensers. does who had this
problem tried this? i don't know if it's to fast to clean the tension peaks.

3. since i've got the same problem using the usb sound card, i thought about
using a usb connection without the power (5V) connection. i don't think that
the quattro will get the information from the data connection...

if anyone has tried one of these possibilities or maybe have another idea it
would be great if you let me know...


thanx a lot
tim


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