iMac starts itself with reboot screen

hbennett

Registered
In the last three days my iMac desktop has begun starting itself up. There is an audible beeping (three or four beeps) and the on/off indicator light blinks rapidly. When the screen comes up there is no desktop but a gray background with reboot instructions. When I type the reboot words "mac-reboot" the desktop comes back.

Under Logs in the system profiler I see the following message:

CGXDDisableUpdate:Updates disabled by connection 0x66-3 for over 1.000000 seconds

and

CGXBlindSurface returns-536870210

The computer is rather old, is running OS X 10.2.8 and has never done anything like this before. I would like to understand what's going on and whether this indicates that I should be doing something?

Thanks.
 
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