I also had an old unused laptop with a broken hinge, so I just removed the entire top half of it! My “topless” laptop now runs my Proxmox Backup Server. If your laptop supports it, you could also look into keeping the battery in and just limiting the charging so it isn’t always at 100%, that way you have a buffer if the power input fails or the power goes out briefly.
I also had an old unused laptop with a broken hinge, so I just removed the entire top half of it! My “topless” laptop now runs my Proxmox Backup Server. If your laptop supports it, you could also look into keeping the battery in and just limiting the charging so it isn’t always at 100%, that way you have a buffer if the power input fails or the power goes out briefly.