Apple Mac 8600 - Manual (Page 71)

Troubleshooting Symptom Charts/System - 8
System shuts down
intermittently
1 Make sure air vents are clear. Thermal protection
circuitry may shut down system. After 30 to 40 minutes,
system should be OK.
2 Make sure power cord is plugged in firmly.
3 Replace power cord.
4 Check battery.
5 Reset Cuda chip. (Refer to The Cuda Chip in Basics for
instructions.)
6 Reset logic board. (Refer to Resetting the Logic Board in
Basics for instructions.)
7 Replace power supply.
8 Replace processor card.
9 Replace logic board. Retain customer's DIMMs.