I got a full replacement (battery plus some piece of circuit board) off thebookyard.co.uk. But I think they're out of everything PowerPC by now, that was 2-3 years ago.Fun fact; The batteries can also be replaced. You just have to source a suitable replacement and do some soldering. I brought mine back to life at as fraction of the cost of buying a second hand replacement.
Ah that would explain it. When i replaced it the first time, I kept the laptop plugged in (with the dead-to-the-point-of-not-being-recognized battery) for like 2 weeks, but i didn't keep it on. Now it was on a lot to cycle the main battery. That may have recharged the PRAM after a while.I could be wrong, since as I mentioned before my PB has some quirky issues with it's lack of ability to charge the main battery, but based on my own experience after replacing the NVRAM battery it only recharged when the Mac was actually running and possibly plugged in.
Well, I wouldn't go as far as to say that; I have used both Windows machines and Macs for over twenty years. I like having the best of both worlds. But different strokes for different folks I guess, I just dislike the whole Mac V PC thing, since it usually winds up with people suggesting one OS is better than the other for whatever reason and anyone using 'the other' ends up being lambasted for it. Life's too short for such silliness.
I'm more 'unix vs windows'. And Unix wins. OS X is a lot more polished than Linux, but I can live with less polish. I've ran Linux when it came on 80 floppies and you had to recompile your kernel to get drivers, it's a lot easier these days.
As for your graphics corruption... That's bad. You seem to already be aware of the issue but just to say anyway; from experience it's usually not so much a warning sign that something's going wrong but rather a danger sign that something already went wrong and now there's irreparable damage. Of course with the graphics on a PowerBook you're pretty much stuck with replacing the entire logic board as the only fix. If keeping it from getting hot prevent the issue for now though, just stay the course I guess until it potentially one day starts doing it even when cold or completely goes south on you.
What's interesting is that I haven't seen that behaviour until i opened it up and replaced the hdd with a m.2 to sata adapter plus a ssd. I didn't touch the logic board or the cooling system. I might open it again and replace the thermal pads and goo in hope I get it to run cooler.