A PowerBook 150 is an OLD 68K based Mac, the factory OS it shipped with was in the Mac OS 7.0-7.6 range…
it’s EXTREMELY limited by today’s standards, an iPod Nano has more raw horsepower, for Og’s sake…, it’s got a 33 MHz 68030 processor, a whopping 120 Megabyte hard drive, and a top ram ceiling of 40 MB, and a passive-matrix grayscale screen, built in monural speaker, and 1.44MB floppy drive…
I/O ports are similarly antiquated, ADB (Apple Desktop Bus) keyboard/mouse ports, 8 pin Mini-DIN serial port, and a 40 pin HDI SCSI port
the proprietary NiCad battery is probably dead as well…
Apple discontinued parts support for this machine well over 5 years ago, when a proprietary Apple part fails, you’ll be dead in the water…
i would put no more than Mac OS 7.6 on this machine, 7.5.5 would be the best compromise…
as a computer, you could use it for basic, lightweight word processing, if you can find a compatible printer with an 8-pin Mac serial port, play some old classic Mac games (Crystal Quest and the like) on it if you can find them
then again, seeing as it’s usage as a computer is limited, I also agree that stripping it for parts just to see how it goes together, just for fun sounds like a good plan…
you’ll need a standard T-8 Torx driver to open the case, the case clamshells apart at the bottom, and there is one major ribbon cable that connects the logic board and processor daughtercard to the inverter board and other video subsystems in the top part of the clamshell…
the 100 series PowerBooks came apart relatively easy, but they are a royal pain in the arse to reassemble
this Mac Technician’s unofficial reccomendation?..
tear it apart, see what makes it work, and have fun…