🚀 go-pugleaf

I have a Centris650 w/250 HD which will not boot, only "?" appears. Both Norton
Utilities & Disk Tools/FirstAid tell me that internal disk is locked and cannot
be repaired unless disk is unlocked. Centris650 has the auto restart switch in
back connected to HD which is intended if used as a server. I have put switch
in both positions and booted from start-up disks but either way same locked
disk message. Norton replies which "error in Node 0". Also I am running system
7.5 but when using DiskTools Disk dialog replies system needs 7.1, when I start
from 7.1 stert up disk dialog replies with same message. Is that a sample of
the sense of humor of some software designer or a common error with system 7? 
	- -Could auto restart switch in back be the cause?
	- -Is there a software app to unlock disk?
	- -Why would the internal HD become locked? 
	* *These error messages appeared after a system crash.

I would like to avoid intialize/reformat being as my faith in the reliablity of
Macintosh Systems prevailed over the common sense to have a complete back-up. I
work with both PC's and Mac's, and although Mac's have there share of
unexpected problems, they are far more reliable than PC's. In a better world
Apple would have prevailed in the marketing arena. Thank You in advance for any
assistance.