What does not work on your RQ30 ? Avolites had a full service schematic for the desks... However, over the years the compamy evolved and went entirely digital (hidden PC Boris etc based...possibly losing or hiding their heritage and ingenuity) and ignored my emails requesting a manual (It is ironic they sent me one when I was negotiating a purchase in the 80's, and ethically returned it when the deal was unviable where I work ! ) My RQ60 puffed smoke the last time I plugged it in and time is in short supply... possibly just a shorted capacitor. Just as I hate typeing on a friend's tablet surface - so many events need the direct feel of a fader for on the fly action - just what I used last weekend with a music etc. event which was TOTALLY unpredictable, not one chase needed, only ambient and sensitive area levels to focus the public's attention... and YES all lighting was LED 3,4,6 channel controlled from a Sirius 24 ! ! (PS f.w.I.w. the floppy on the RQ was lo density 3,5" single show per disk.)