sorry to hear you are having problems. could i ask for some details as to whats not working, and what you have tested so far?
from what i can figure out, you've bought an A2060 ArcNet card. you've plugged it into your A2000, and it boots like normal? and you think the CPU is broken? sorry, i'm not following.
you do know that ArcNet is different from ethernet, right?
thanks,