Originally Posted by B-string
I would still contact Crown. It maybe a known issue they have a fix for.
I would see what Crown have to say! apart from the usual shouldn't you have saved up for a lead sled Macrotech for subs, personally I would be interested in looking at all mains supply components and voltages outside your amp first.
Sounds like you need to bump a little something into the power supply caps before it can get the current to start up.
Might be a venue supply voltage issue, is this a permanent instillation or are you moving it.
PS could be just some dust has got into a relay somehow.