HP Pavilion 400-434 Desktop - 511 CPU fan not detected...

[mikey59]

I've got a user who's a pretty good distance from me, who's pavillion slim line 400-434 is giving him the 511 CPU fan not detected error on startup. My first instinct was to pick up a fan & head on out there, but from what I can tell, that PC uses a Nutmeg-P motherboard, where CPU is soldered to the motherboard, making me think this may not be a fan I can just run into a Fry's & pick up a replacement.

Can anyone confirm this & tell me what my options are?

Thanks!

[WAWood]

mikey59

Hello;

Allow me to welcome you to the HP forums!

I maintain some older HP PCs for folks, and in the last several months, I've seen this same problem on ALL of them!

And in ALL cases, both the CPU fan and case fan are working fine!

This is some kind of fault in the BIOS that claims the CASE fan is not running.  If you go into the BIOS hardware monitoring section, you will either see no case fan listed, or you will see a fan speed of ZERO.

In my cases, the case fan was listed and ALL reported fan speeds of ZERO.

I tried different fans, and no change -- so obviously, this is a flaw in the BIOS error reporting logic.

The way to "fix" this is to disable the message -- and to do that, you have to go into the BIOS advanced setting and if case fan monitoring is enabled, you Disable it.

Good Luck

[mikey59]

I had seen that, after some initial googling of the error message. I would assume that if the fan is indeed not operating, it would shut the computer down after a few minutes? If so, I'll tell them to ignore & I'll check it out & take the appripriate actions when I can get out there. Do you know if there's a BIOS update that fixes this?