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PC won't boot up
« on: March 24, 2011, 03:13:41 PM »
Need help.
This was intermittent for several start ups, now won't work at all.
PC starts to boot up, then a message .. "CPU FAN is not connected".
The fan is plugged in to the mobo but looked like it was spinning at about half speed.
I put another fan on and it spins up to what looks like a normal speed but the PC still won't boot up.
Get the same message then it shuts down.
Yesterday after 4 attempts, it finally took off and ran normally.
Now it won't start even after umpteen attempts.
Any help needed badly.
Thanks,
Russ
Re: PC won't boot up
« Reply #1 on: March 24, 2011, 03:25:49 PM »
You could start on the bios and disable the CPU fan warning.

This not really recommended but give it a try.


Jeff
Re: PC won't boot up
« Reply #2 on: March 24, 2011, 03:32:35 PM »
Hi Jeff,
How do I get there.
There is a very brief screen, then the message.
Thanks
Re: PC won't boot up
« Reply #3 on: March 24, 2011, 03:42:28 PM »
Depend on what type of computer you have.

It is written when the computer boot.

Normally, this key is Delete

Jeff
Re: PC won't boot up
« Reply #4 on: March 24, 2011, 03:45:25 PM »
Normally, is you can enter in the BIOS, you should find under PC Health status the RPM for the fan.

If is is spinning, try reducing the RPM a bit to see if it's make any difference.


Jeff
Re: PC won't boot up
« Reply #5 on: March 24, 2011, 04:08:09 PM »
Jeff,
This is the only screen I get for about 3 seconds, then the FAN message, then it cuts OFF.
I can't get to the bios or anything else.
It is just a mobo mounted in my panel, not sure what it is. lol
Thanks
Re: PC won't boot up
« Reply #6 on: March 24, 2011, 04:23:18 PM »
when booting up, if you keep hitting DEL key, you can't get access to the BIOS???

This sound bad, look like a bad hard dive.

But even with a bad HDD, you should be able to access BIOS


Jeff
Re: PC won't boot up
« Reply #7 on: March 24, 2011, 04:28:54 PM »
Try downloading the manual for your mobo.

Sometime on some mobo, there's a jumper to skip or prevent access to the bios.

What brand and model is it.

Jeff
Re: PC won't boot up
« Reply #8 on: March 24, 2011, 04:37:04 PM »
If your computer does not boot at all, you will probably need to clear bios setup, it may be corrupted.

Or just to be sure, verify that keyboard is connected.

Jeff

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Re: PC won't boot up
« Reply #9 on: March 24, 2011, 04:58:08 PM »
To be honest Russ it sounds like the mobos sensor is screwed but check the fan is connected properly and to the right header as often there are at least 2 or 3 fan headers. Also worth cheking the wires on the fan as there should be at least 3 possibly 4, if the fan you put on is from an old computer it may just have 2 wires.
Hood