Overlooked the obvious #@$?

timofred

I'm just a garbage man...
Bad hum was coming from the computer to the amp, only when the screen is on, sleep mode was not as bad, anything utilizing the sound card got way worse.

So I spent about 2 hours trying,
earth wire from computer to amp = no
clean a very small amount of dust from inside the computer = no
changed the slot the sound card sits in = no
swap monitor cable = no

Ggrrrrr..........

Change the screen = bingo
either the 23volt supply or something in the screen was causing it.

Glad I finally found it,
mad at myself for not looking there first.
It seems so obvious now.
 
That kind of thing can be hard to troubleshoot. Good thing you had another monitor on hand to make that swap.
 
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