Reply 12080 of 14730, by Merovign
I'm thinking about a thing.
I got a bunch of 80s laptops (and one 92). One of them functions fine, about 6 of them are designed not to power up without a functional battery... the others are kind of slightly disassembled.
I started working on power supplies a little while ago but I think I need to do a deep dive into the subject. Most old laptops for sale come without power supplies and may of those are kind of non-standard in various ways (multiple voltages, multiple pins, communication between the external PSU and the device, etc).
A lot of older laptops actually have separate PSU boards inside the laptop, which could be electrically duplicated (and probably smaller, lighter, and with less power consumption).
I hope to make some progress soon and if I actually get one working I'll make a separate post about it with the steps I took.