I have a Apple PowerPC G5, purchased in Jan. 2005 (2g, 512 MB). Use it only for light home duty, some graphics work, reports, etc (yeah, way much computer, but it is what I wanted and I used bonus $$ to buy).
About a year and a half ago my HD went south, after warranty ended. I installed got two new, larger HD's, worked fine.
A few months after that we had a power outage (live in Fla., land of power outs), and I could not get the computer to activate. It would start, but then it would go to the Apple gray screen and spin there, eventually getting the circle with bar through it.
I took it to local Apple store to have it diagnosed. Tech said it was his opinion that it was logic board. Too expensive to replace he said. Better off getting new.
Took back home, plugged in. Out of pique, kept turning it off and on. *Surprise!* It activated. *Until* the next power outage. Had to go through the multiple off and on routine. Now, every time there's an outage, or I need to shut off the Mac for whatever reason (IP address needs rebooted, or related shutdown routine), I have to go though an extended off/on routine, sometimes *days*!. Sometimes would stay black screen and I'd get the racing engine effect.
I did notice during this that the light on my mouse comes on initially, then will go off and come back on within 10 seconds if the machine is going to start. Stays off, natch, if it isn't.
If this is truly a logic board, any idea on cost of replacing or any suggestions on something else it could be. I have cracked the case, blown out the innards, made sure everything was connected, etc.
Any ideas would be a big help.