Compaq Proliant 800 fan detection

[Bozz]

I have a couple of old Compaq Proliant 800 (450 PII) PCs that were given to me. I'm in the process of tidying them up so that I can ship them out to a charity I support in St Lucia. They are only for use as workstations and as such are fast enough. On one I replaced the large case fan by the CPU with a new Akasa amber fan plugged into the power leads with no sensor, no problems. I did exactly the same with the other and it shuts down at startup having not detected the fan.

Does anybody know how to disable the fan monitoring? I can't find a jumper of BIOS setting anywhere.

Thanks in advance.

Ian Boys
DTE Systems Ltd

 

[paparazi]

Bozz
Strange but if it isn't there:
If the fan has the yellow sensor wire you could just put this one to the CPU fan header to trick the motherboard.


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[Bozz]

Basically I spliced the red, black and yellow wires from the new fan on to the old connector, but no dice.

Ian Boys
DTE Systems Ltd

 

[franklin97355]

The fan may be turning too slow for the liking of the computer. there are devices that send two pulses to the mobo for each revolution but I don't know where to get them. Quiet computer people use them to allow large slow fans to be used in the computer. Make sure your connections are secure. 1400rpm should be enough but check to see if there is anything about the lower limit in the documentation.