On Aug 13, 9:54*pm, Ken wrote:
* * * * Have you looked at the MB power bus (+5v I would assume) for ripple
when you attach the external power supply?

this is what I am asking for, I tought I should measure it at the
socket pin holes, how can I idetify the +5V line on the motherboard?

And how would you measure (and fix the cause) a ripple on the bus? I
have a couple of scopes and multimeters for that, but how?