@PurpleJillybeans Does it need to be specific to retro computers, or just something that fits the era?
I think you might be able to draw some inspiration from the NWS. I don't think they've changed their logo in ages. It's basically just 🌩️ in front of a globe, but the styling feels a lot different than what you typically see in modern logos.
Maybe take the same style of lightning bolt, but put it on a CRT in front of a solid circle (with clouds filling the void?), then the site name in a rocker over that?