Don’t be afraid to uninstall. Think of all the time you’ve spent trying to fix the problem so far…then think of those 5 to 10 mins it will take to un-install and re-install Avid.
It will not delete any projects.
I have 1 system still using an Adrenaline. When it gets flaky it is usually because of the firewire needing a kick in the but. If you turn off the Adrenaline does the pc make the “dunk dunk” sound? You should hear that on power down, and about 10 secs after power up. If not, check your cable, and yes, as Richard said, unplug your other firewire devices.
Also check for the splash screen on your external monitor after power up. That is provided by the Adrenaline. If it is there, the Adrenaline is working.
If those don’t work, re-install.
Glenn