I have an HP EX475 mediasmart server which has just blown its second power supply. The PSUs always fail when MY UPS kicks in (I know this now!!) Whilst I look around for a replacement from another manufacturer I thought I'd use another PSU to get the server running again. I found a redundant PC PSU with an 20 pin ATX connector (it even had P1 stamped on it the same) I was just about to plug this in when something made me check the wiring. The old PSU and this PC one seem to be wired differently. I have buzzed things through and they do indeed seem to be different. The PC PSU complies with the ATX standard that I can find all over the net. The blown HP supply is different. How can this be? Surely a standard is a standard - it makes me concerned about getting a replacement that is wired correctly.
Any body else got any experience or advice?