Ok, this is for a friend's system....
Her system is an LC475
If she powers on her Mac, it will make the startup sound but will then stay on a
black screen forever. If she turns it off for a while and then tries again, the
same thing happens. However if she turns it off and then on quickly, it will
start up. When it starts up, none of her PRAM settings are present (date is
wrong, etc...) Doing a restart after setting everything up will also cause it
to lose the settings - but it will restart, not freeze up.
Have tried zapping PRAM but the machine just hangs as above. Please help offer
some suggestions as to what needs to be replaced. Backup-battery? Some special
PRAM chip, etc? Any help will be GREATLY appreciated (the sooner the better as
she's getting into a pretty bad panic)