Paul,
Tried what you said. Desk channels set at 20%, trimmed ch1-2 pot so lamp's were dim glow, trimmed ch3-4 pot, this brought up levels on ch1-2 and 3-4, so trimmed 1-2 back so 1-4 same intensity, trimmed ch5-6 pot, this brought up levels on all channels, again trimmed 1&2 + 3&4 back so all channels dim glow. Went to desk, faders 100% = all lights to 100%, as I brought faders down, at 10% all lamps were off, at 0% all lamps shot back upto 100%.
As a double check I moved all the pots to the same position as one of our working packs to find similiar results to above...
HELP ?
Chris