I already tried all the usual stuff; that didn't work. When I try to turn it on, it doesn't. It will never, ever turn on by pressing just on.
PTT didn't work (I thought by invoking a different part of the bootcode it might work), [on] + [del] didn't work, nor did [on] + [mode]. Don't do [on] + [mode] unless you're desperate; it basically wipes your archive.
I also tried new batteries; that didn't work either. My computer doesn't recognize my calc at all; I might try using brandonw's overflow Firday when my brother gets home to invoke a few last-resort measures.
Would it be at all possible to modify the BIOS so that there is an inbuilt backup OS to restore to?
EDIT: There's no way on earth I will ever do anything to this calculator that would wipe the archive, since I just finished writing an ascii mapmaking tool, which is my crappy flagship multi-page menu program, so don't bother suggesting that I clear the archive to fix it. I'm stubborn and will eventually find an alternative method.
EDIT: From what my brother and I have been able to determine, it's a bad flash chip. I'm going to try to fix it tomorrow during Algebra II…
EDIT: Archive got wiped, and I'm running 2.20, however, it's still really crashy and it can't garbage collect due to my fully wiping the flash chip (it appears I have a bad one) and it never flagged a 64k sector to use for garbage collecting. If I try to archive a program, it crashes back to its original screwed up state, so I'm currently shopping around for one with hardware revision G or earlier. I figure if I have to get a new one, it might as well be a damn good one.