HP EliteDesk 800 G3 DM 65W Ventilator always running during start

[jaume-ksso]

Dear Sirs,

In our school we have around 100x HP ELiteDesk 800 G3 DM 65W Business Desktops.

Sometimes when one of this PCs is starterd, the ventilator begins to run continuosly and very noisy.

If we shutdown the PC and start again this problem is away.

I have tested the hardware of the PCs with HP Hardware Diagnostics UEFI and everything is OK.

By the Windows 10 OS event viewer I cannot find any error either.

SO, what can I do to avoid this noisy problem?

Best regards,

Jaume

IT KSSO

[jaume-ksso]

Today I made a test with the Software SpeedFan 4.52. I have monitored the CPU Temperature of the 4 cores of a HP EliteDesk 800 G3 DM 65W and SpeedFan showed that for some seconds the reported temperature  of some CPU cores was 50 Celsius and then decreased until 30 Celsius.

Curiosly, the computer room and the PC itself were rather cold as the Computer room has a very strong airconditioning system.

So, the 50 Degrees Looks like too much. 

I wonder if this Kind of temperature measurements are the ones that trigger the fan.

Regards,

Jaume

[DGroves]

by "Ventilator " do you mean a fan? if so please call it  a fan in future posts,.... if not please describe just what a "Ventilator " is

next if a fan, is it the cpu fan or a case fan?

last, it's not uncommon or a problem for the cpu's internal temp to rise to 50c for a brief period  (10 sec or less) and then drop down without any fan increase unless the temp load remains high for a set period of time that the computer mfgr defines in the bios

last, it's normal for a systems fan to ramp up in speed when first powered on and then settle down to a lower speed

[jaume-ksso]

a. Yes, fan is the correct word. I was unsure of the terminilogy.

b. I'm not sure which fan is. I will check it.

c. The problem is that when the problem happens (the fan runs at top speed at the time of boot very noisy)

    ,and it doesn't happen often, the fan NEVER settles down to a lower speed. The Windows OS loads normally but the 

    user can not work with the computer because the noise is so loud. In this cases what we do is: press the shutdown button

   for some seconds, then a hard shutdown happens, restart the PC and the problem disappears Always for this time.

   So, at the ned the user can work but we would like to avoid the Problem in the first time.

Thnak for our post.

Jaume

[DGroves]

if your system is starting up, and then the case fan is ramping up in speed check the CPU fan it may not be working correctly

a shutdown like you describe appears to be due to the cpu reaching the temp level or a thermal temp sensor on the motherboard, or a ambient temp sensor is going bad where it triggers afan speed increase

check the fan(s)  (or simply replace them) and also check that the thermal compound on the cpu is properly applied and the cpu cooler is properly seated