Question Power supply error message

[jamesdsimone]

I've been getting a power supply fan not detected/malfunction error message when I boot my HP z240. The fan is running when I check it and the air is cool. Bypassing the error message tit boots ok and seems to run fine. Is this a problem with the PS or a MB sensor?

 

[BoomerD]

Your motherboard monitors the PSU fan? Are you certain it’s not a CPU fan warning?

 

[jamesdsimone]

Your motherboard monitors the PSU fan? Are you certain it’s not a CPU fan warning?

Yup positive it but I'll double check. The MB must be monitoring it. These HP's monitor all kinds of things. My z420 gives an error code at boot because the front audio panel is not connected.

 

[mindless1]

See if you can get Speedfan or some other app to show the fan RPM, possibly it is below the fault threshold.

How long have you had it? Long enough in its lifespan that the fan might be wearing out or the lube is dried up?

If it's a sleeve bearing fan, I might put a couple drops of gear oil in it. Actually I use a homebrew that's of higher viscosity by mixing grease to a drop point barely at room temp but use whatever you have. A drop of used motor oil beats a fan with a dry bearing chewing itself up.

 

[jamesdsimone]

See if you can get Speedfan or some other app to show the fan RPM, possibly it is below the fault threshold.

How long have you had it? Long enough in its lifespan that the fan might be wearing out or the lube is dried up?

If it's a sleeve bearing fan, I might put a couple drops of gear oil in it. Actually I use a homebrew that's of higher viscosity by mixing grease to a drop point barely at room temp but use whatever you have. A drop of used motor oil beats a fan with a dry bearing chewing itself up.

It's an old HP z240 workstation I got from ebay. I have no idea how old it is but it was only 135.00 and has pretty good specs i7-6700/32GB ram/256GB Samsung NVMe/1TB SATA drive. So replacing the PS wouldn't be the end of the world. It boots and works fine just kills the advantage of 30 seconds boot time since it hangs at the error screen.