Will’s Console Mods is now selling the latest version of their internal PSU replacement kit for all non-slim models of the PS1. While I always prefer to use original PSU’s, if yours completely died, or if you’d like a PSU compatible with all power signals around the world, these replacements are a great choice. I strongly recommend getting a DC barrel jack version, or if heat is a concern for you, get the Noctua 40mm or 30mm Fan versions, which also utilize the barrel jack. My usual power warnings and more info below the links:
There’s a few things to note with these kits and the first is something I always say when discussing power: Be careful. Improperly built power supplies can kill your console…or even burn your house down. That said, Will’s been putting a lot of effort into these kits for years and they seem like a safe bet – Just make sure to get a high quality external brick, with all the proper ratings and certifications. Even though it’s more expensive than the PSU on Will’s page, I recommend the one linked above, as we’ve
been testing Triad PSU’s for a long time and they’re consistent. And as always, I recommend staying away from USB-PD; Even if Will’s design is perfect, it’s too easy for something else to go wrong in the future. Do what you’d like, but don’t say I didn’t warn you.