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| javeryh:
Thanks guys. Nothing on the PC is coming on - no fans, lights, LEDs, etc. A hard drive failure seems unlikely because I'm using a new SSD but everything else is ancient. I have been leaving it on a lot so it makes sense that something would go wrong with the power. Are power supplies swappable? Right now I have another non-working cab but the computer comes on in that one at least so maybe I can swap it out (that computer is even older though LOL). My "spare" PC is one of those small form factor HP office PCs so I don't think I can swap parts with it. |
| yamatetsu:
As long as the connectors are the same, you can swap power supplies. The only issue you might get is if the replacement PSU is too weak, i.e. your computer needs a 450W unit and the one you put in is a 250W. But even that one should at least power the PC up. |
| Zebidee:
--- Quote from: javeryh on October 02, 2025, 10:29:00 am ---My "spare" PC is one of those small form factor HP office PCs so I don't think I can swap parts with it. --- End quote --- Most "standard" PCs run on an ATX power supply. I am familiar with those old HP SFF PCs (small form factor, and yes I still use some, I even have one with an old E8600 core2duo CPU running Windows 10), and can confirm that their power supply is NOT suitable for general PCs. Well, I'm sure you could get it to work but it doesn't have the connectors, and it has a weird shape and won't fit inside the case easily, and may be somewhat underpowered (I just checked one of mine, 240W rated, so actually not that bad). You could buy online, but for this I suggest you go down to a local computer store and buy a new standard ATX power supply. They will probably have a small range for you to choose from. Not all ATX PSUs are the same. If they have three kinds, you probably want the middle type, maybe rated at around 450W to 650W. Not cheap/nasty/weak/underpowered, but not some overblown mega-gaming powerhouse money-magnet. Sure, you probably only need about 200W, but manufacturers usually put as large a number on as they think they can get away with, and you don't want the PSU to be struggling. Better PSU, higher rated, will last longer. This is only a wild guess, but I expect it to cost you around $20-$40. There is more to ATX PSU than their wattage rating, but you can always ask for more advice at the computer store. I suggest you remove the old PSU first (only four screws), that way you can check out the ratings yourself, even take it to the computer store with you. This is all pretty straight-forward but, as this is new to you, take some photos to help you remember how everything fits together. All of the above is a gross simplification, and all such advice comes with my usual disclaimers. |
| javeryh:
They don't look interchangable. This is the one I suspect is broken: And here's the more normal looking one I have as a replacement: I don't see any way to make the connections from the replacement since the connectors are not the same. I also opened up the spare PC I have and I'm not sure I'll be able to use that either since there are no motherboard pins to connect an external power buttons to. There is a mini button soldered directly to the motherboard that is pressed from the outside case. :angry: EDIT: I just ordered a "new" (used) power supply from eBay for $16. Should be here next week. Hopefully I can just swap it out and everything will work. If not... I guess it's time to get another PC and set it up... Honestly, I kind of want to do that just because the PC I have is hot garbage and so slow. I'd like things to be snappier, if possible, but I dread setting up Hyperspin/Rocketlauncher/Hypermarquee from scratch. There were a ton of little issues last time... |
| Zebidee:
--- Quote from: javeryh on October 02, 2025, 10:29:00 am ---My "spare" PC is one of those small form factor HP office PCs so I don't think I can swap parts with it. --- End quote --- --- Quote from: javeryh on October 02, 2025, 12:11:30 pm ---They don't look interchangable. This is the one I suspect is broken: --- End quote --- Well, now I'm officially confused - I thought the HP power supply was your spare, not the faulty one. FWIW, yours looks exactly the same as mine. Anyway, yes, I bought a new replacement PSU for one of my HPs some years ago, from ebay. In fact, I just found a link (last one!): https://www.ebay.com/itm/226507214609 But I guess you've already purchased the used one, just read your edit. |
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