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I have a motherboard for a HP business desktop dx5150 PC. The model written on the board is "MS-7050" and it is for an AMD socket 939 processor. I got everything installed in it, and when I turned it on, it showed a message stating that there was a "CPU Fan Error" (or some similar language) and then turned off. It never stays on for more than about 30 seconds, probably less.
The fan had previously been working great, but I replaced it anyway with a brand new Cooler Master fan. This did not work. I then reset the BIOS with the jumpers on the board, no dice. I replaced the CMOS battery. Same error. I then replaced the entire computer power supply with a brand new Antec, same error.
The fan header is keyed, and has room for 3 pins. The CPU fan is designed the same way, so its not that I'm missing a temperature sensor or anything.
Can anyone give some suggestions? Especially maybe some secret keystrokes to bypass this error?
1+1 Actually, I think yours is the right answer. I think the MB was proably damaged from heat as the previous fan went. He said in his question "I got everything installed in it, and when I turned it on, it showed a message...", which would indicate it was cold when turned on (or cold at some point, and he would have mentioned it happening then), so the CPU cannot have overheated yet. – KCotreau – 2011-06-19T03:29:37.087
A point of clarification (I'll edit above with details) is that this motherboard is a replacement for a previous motherboard. So, the MB cannot have been damaged by heat- it has never been fully turned on in my system. – John – 2011-06-19T05:06:44.767