Take the whole machine apart - check all the card serial numbers (make sure they are ours...) blow out all the dust - clean the fans, clean the case. Re-install cards, wipe content drive. in cases where other software has been installed. I wipe the system drive and re-install from a disk image I've created - it has the best optimised settings, and all relevant software and drivers installed etc. Output panels and scan converters etc usually need checking and some re-wiring

Now that V4 is comming along - I'm starting to build dual partition so still got option of either version (once v4 is properly released)

Then soak test it all for about 4 hours and check al outputs. Its a bit of a long process - but some of it gets done when the catalysts come back off jobs - so that theres a quick turn around when they go back out...