System fan has failed

Drake5 · 28 Jul 2015 at 20:38

On one of my older systems I've replaced an 80mm fan that connects directly onto the motherboard

Replaced with a 120mm fan but when the 120mm fan is in I get a message saying system fan has failed. If I plug in the 80mm fan this message doesn't come back on, if I take the fan out completely I get the same message

I know in some bios you have hardware monitor where you can disable certain things but this bios doesn't have hardware monitor

Any one have any ideas on what this could be

RJC · 28 Jul 2015 at 20:42

How many pins does the old and new fan have? its not that the new fan does not have a speed sensor? or the new fan spins too slowly for the motherboard to register.

Drake5 · 28 Jul 2015 at 20:43

They are both 3 pin

The message comes up even when no fan is attached

RJC · 28 Jul 2015 at 20:46

What motherboard are you using?

Also check to see if there are any BIOS updates.

Drake5 · 28 Jul 2015 at 20:54

The motherboard is M2N68-LA (Narra6) was never able to find bios updates

RJC · 28 Jul 2015 at 21:00

I see what you mean

, part of a HP system.

Did your old fan ever change in speed with system load?

You might need to change the fan to a higher speed version.

Drake5 · 28 Jul 2015 at 21:02

I'm not sure if it did tbh

I replaced it with a 120MM Corsair AF series fan which is a decent fan

RJC · 28 Jul 2015 at 21:09

hmm, can you test the new fan in another system to ensure the speed sensor is working ok.

But I think the new fans turns slower so the system can't see the minimum speed.

Are you sure there is no way of disabling in the BIOS, it might be the most stupidest area

Glanza · 28 Jul 2015 at 22:03

Does the 120mm spin up ok?

smilertoo · 29 Jul 2015 at 02:01

Plug the fan directly to one of the psu cables and disable the error msg, sorted.