Refugee wrote:That 8 seconds sounds like a time out by the processor waiting for the mode switch to show the mech in the ejected position.
Thats right Ref, if it's not already there the mech will try to reach the unload position and then attempt eject if a cassette if inserted, if this isn't achieved within the 8 seconds the the machine shuts down to prevent damage.
If Aidan has done what I asked and manually wound the mech to the half way point the the first thing that should happen is that the switched supplies should become established and the loading motor should start to run irrespective of the position of the carriage.
Aidan, the power on signal for the PSU comes from pin51 of IC204 on the mechacon. Check here with your meter and tell us what you have during the 8 second period when the channel indicator is lit.