a few days ago, my 7200/75 failed to respond to any input and its clock display was frozen suddenly. Switching off and then on again, it hanged almost right away before one could zip its PRAM, with its monitor being in standby mode. Also it did not try to boot from floppy.

I was using MacOS 7.5.5, with 24 Mb RAM, no peripheral attached.

Any ideas what I can do to save my Mac? Many thanks.

Qiang