

Thanks! The whole PC had a time (when its age was ~20 years) where it still booted, but with reset BIOS settings, followed by a time where it doesn’t boot up anymore. So I believe the most likely thing is that it leaked and caused damage. Retro computing community thinks that the most likely cause is battery damage.
Here is the exact model from someone else: https://theretroweb.com/motherboards/s/msi-3121-v3
Battery (top-left) already removed, but it shows that this one has leaked before as well. When you look closely, you see battery residue on the nearby 8-bit ISA (?), so it must have leaked a lot at some point and been cleaned up. Unfortunately, it came with a notorious Ni-Cd Battery; even for its time not the best.



The one point I don’t completely understand is the tax debt: Wouldn’t a failed business, no matter how ridiculous, be a complete write-off?
Maybe the problem is that he has to tax each fiscal year independently, so a tax debt in 2023 from successful freelance work would not be diminished by a failed “business idea” in 2024.