Quote Mike Craig.:
The internal fuse is rated at just 0.5 amps.
DISCONNECT THE MACKIE FROM THE MAINS BEFORE OPENING THE FUSE DRAWER.
The fuse drawer is just below where the power chord plugs into the desk.
You can test the fuse using a fluke (multimeter).
If you need to replace it, use a 0.5A (500mA) SLO BLO 5x20mm fuse.
NOTE: THIS FUSE RATING ONLY APPLIES TO 240V MACKIE MIXERS.
Sorry Mike, I should have been more clear. that is the fuse I checked. Where is the other one located?
I'm All Ears.