When I try to boot it, I get no monitor response, and no idication that it's receiving input, nothing.Turns out the CPU heatsink got loosened up, but it wasn't complaining about heat before.

Friends are suggesting to reapply thermal paste and put the heatsink back on and see if that helps at all.

Worst case scenario, I can probably salvage the hard drives and get all my art off of that. I already have all but a couple especially recent commissions backed up, so I'm not too panicked about trying to save everything.