My dad has a cube based pc and recently the fan on the northbridge HS has given up the ghost, one of the case fans was the same size as the formentioned fan so i swapped them over, including MB sockets.
Now on booting the pc it emits repeated long beeps, i can find the error for repeated short beeps but not long.
Cheers, the computer itself doesnt get as far as the boot screen so i cant check the type, got a feeing it might be award, which by the site, might make it awkward to diagnose.
As to what i've done....the bearing on the nothbridge fan gave up, its as far as i can see a 40mm case fan. As a tempoary solution i moved one of the machines case fans to replace the one on the northbridge chip, including moving the motherboard fan headers in case of any fan moitoring within the bios.
Now on boot the machine repeatedly gives a long beep and refuses to boot. I've checked the ram seating & psu connections so im beginning to think there may be ether a psu or mobo problem.
On my mobo its printed, but all i can find on this one is the serial 4845glq/gvq v1.1 which when googled doesnt give any hits, did find a sticker saying phenix bios, but under that section no mention of repeated long beeps. The machine itself is a p4 celly 478 with an intel chipset as far as i can gather.
I would suggest its probably something to do with the fan. Just because its the same size doesn't mean its that same type of fan. Either swap it back or buy a Northbridge heatsink and install that instead of another fan.