The PSU is fine on the Windy (not sure why anyone thought otherwise). Gets proper voltages with and without load.
The cab doesn't do anything though... No
audio, no video (the monitor does static up).
As for the E2s, they're both up and running with lovely monitors thanks to
@XeD,
@300wins, and a big personal thank you to
@radiantsvgun.
So current statuses are:
E2s fully working.
Q25 fully working.
Domy Theater has a 100% dead monitor.
Windy doesn't display any picture or make any sounds but gets proper output from the PSU.