I have a pro v3.3 server on tour that is displaying these same symtoms. The lock up usaully occurs once I display any .tiff file larger than 5mb in size. Tonight the server went down in the show and would not reboot. Had to take it out of the case(Highend Anvil Case) set it up right and let it sit a bit. This too is a stock HES server. Any insight would be awesome! I tested it during load out a bit and all seemed fine, will test on the next show day...

Robb-
Lighting Designer
My Chemical Romance