Cobaltcleaned it up, swapped out the caked-on thermal paste from the CPU, put the PSU back in, all that fun stuff. I got it to boot into an image of arch, so I'm positive that the reason it wasn't booting was because of the hard drive going bad. for some reason none of the OSes on my ventoy would load when the stick was plugged into the front panel - bad port or something? whatever. I can boot into an OS and that's good enough for now
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