I've just inherited a Wallstreet Powerbook (233mhz/14.1"/192mb/4gb). Its been sitting around unused and disconnected from power for 6 months or so. I got it home and used it for a few days, installing software and suchlike, then this morning it refused to boot. I'd get a startup ding, then it would just sit there doing nothing indefinately - the discs wouldn't spin up, the display wouldn't come on. The CPU does seem to get quite warm though. I've done all the usual things - resetting the PMU, leaving it plugged in to charge the PRAM battery, disconnecting the PRAM battery, I've swapped RAM out with other machines, reseated the CPU board etc etc etc. The problem first showed up when it froze halfway through installing the OS 9.2.2 update. Very occasionally it will boot and work fine, but next reboot, its back to its old tricks. I can't see any reason for when it works and when it doesnt.