Apple Power Macintosh 7100/80AV - Manual (Page 39)

Troubleshooting Symptom Charts/System
(Continued)
- 5
System
(Continued)
System shuts down
intermittently
1 Check that air vents are clear. Thermal protection circuitry
may shut down system. After 30 to 40 minutes, system
should be OK.
2 Replace power cord.
3 Check batteries. Refer to "Battery Verification" in Additional
Procedures.
4 Replace power supply.
5 Replace logic board. Retain customer’s SIMMs.