Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

Question

my cooler master masterbox 5 fans wont spin

Mar 20, 2018 12:31AM PDT

I know that my mother board gets power, since the leds in my mouse light up when i plug it into the motherboard, but the fans that were pre installed in the case when i got it wont spin when i turn on the p.c.

Discussion is locked

- Collapse -
Answer
Re: fans won't spin
Mar 20, 2018 1:23AM PDT

Do they have power?

- Collapse -
Of course
Mar 20, 2018 7:27AM PDT

Like i said, its plugged into the ports on the motherboard, both of them into fan system 1 and fan system 2, but when i turn on the computer, they just dont work. My graphics card fans spin, but the case fans dont.

- Collapse -
Your'e not understanding
Mar 20, 2018 10:24AM PDT

What Kees is asking ...
How do you know that the fans and cooler are getting power ?
What kind of PSU do you have ?

Post was last edited on March 20, 2018 10:26 AM PDT

- Collapse -
(NT) Modular
Mar 20, 2018 11:28AM PDT
- Collapse -
That does not answer the real question.
Mar 20, 2018 12:15PM PDT

Without the make and model of the PSU I can't check some basics.

It also doesn't tell us if the PSU is working correctly. Did you get out the Volt meter and measure all the legs?

https://www.youtube.com/watch?v=hMP_zqlgzDc

- Collapse -
Answer
Make it smaller
Mar 20, 2018 1:45AM PDT

Psu+mobo+cpu/hsf.

Nothing else connected or plugged in.

Power it up......does the cpu fan spin?

If not replace the cmos battery.....it's the cheapest part.

If the fan still won't spin move the mobo out of the case and onto a piece of cardboard.

If the fan still won't spin your down to 3 parts.

- Collapse -
Answer
This is false!
Mar 20, 2018 11:05AM PDT

Just because the mouse lights up this does not mean power is present for running fans. The mouse runs off a +5V rail and fans off the +12V rail. So a mouse lighting up tells us very little.

Also a lot of fan ports on motherboards just don't work (remember I only see dead PCs) so we rewire to the PSU connections instead for those cases.