I'm running MacOS 9.1 on an iMac DV 400mhz. The system has been mostly stable, but in the last couple of days I've had 3 sudden unexpected shutdowns. The first two were as if someone just pulled thte power plug. The last time though, it just immediately came back on and saved the state it was in. The power did not surge, or at least it did not seem to as the desk light attached to the same surge protector strip did not even flicker. I was using different applications each time, once Word, the other Eudora.
Is an early sign of some hardware failure? I've checked the power cable which was firmly in place in the back of the mac, and to the outlet. Any ideas or suggestions greatly appreciated!