While it can be fun to work with a classic computer, they can be quite temperamental. There are many cases when the power supply is no longer functioning and it can be difficult to find a replacement. I discovered this problem when I purchased an Atari 520ST off eBay that didn’t come with a power supply. Buying one by proved to be difficult and expensive. So, I looked into alternatives and I found something that worked quite well using the Pico Power Supply Unit. The video above shows how I put things together and got it to work and this process can work with a variety of computers.