[Futurist]

I am running HD3 Accel, Pro Tools 7.3.1 on a Mac Pro 2.66, OS 10.4.8, with 2 gigs of ram, and have observed an odd boot behaviour about 2 out of ten times. I press the power button, the light comes on, but no other computer activity. I then press and hold the button to force shut down, then I boot-up again, which 90% of the time will boot-up normally-(occasionally takes 2 or more times).
This ONLY occurs with the Digi cards installed. I spent 4 hours at a local Apple store with a tech recently, and we exhaustively tested everything possible, and the Mac is 100%, without the cards. The cards all check out perfect with DigiTest, but there is clearly a glitch happening somewhere. It also happens with any combination of 1,2, or all 3 cards. I'm not sure if it is worth sending back the cards for exchange, although it is likely. The Digidesign tech I spoke to had never heard of this before. Is there anyone else who knows of this?