Internal battery replacement – check
PMU reset – check
PRAM reset – check
NVRAM reset – check
Computer starts up on the table, with only one monitor and a keyboard and mouse connected – check
Retains time and date – check
Start up in the enclosure with one monitor, a keyboard and mouse connected
Start up with Ethernet cable attached – check
Start up with ProTools cables attached – check
Open PT software – check
Shut down computer and plug in monitor extension – crickets
Pull G4 out of enclosure and try to start – crickets