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Bios messge: CPU fan not function!

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by itek4u

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Compaq Presario 5000, 830 CF Rev 3.0 SiS 730 Chipset, Socket A motherboard.

2 issues.

A. A previous technician installed a new motherboard and then changed a setting in the BIOS to have the Hardware monitor enabled. The PC will not post now because of that being enabled. You can hear the RAM detect, then a message pops up saying: 'CPU fan does not function properly!'. The system then shuts itself down.

The fan is connected to the motherboard and is visually spinning.

I have been told to do a Flash of the BIOS. How am I supposed to do this if it does not get past the message? I tried doing a reset of the BIOS via change of the jumper, but that did not work.

B. There is also a green wire not connected to the pins. I do not know where this goes. On The 16 pin set up,
1. the black wire is connected to pin 6, which is the center of a five pin power led setup,
2. the yellow wire is going to pin 8, which is number four of the power led setup,
3. next is the IDE led pins where white is on pin 1 and red on pin 2,
4. then power button (pwrbtn) is the orange and blue wires. I checked up on the Compaq site via but that did not help.

Help, the people want their computer to work!

Mars

4 replies

by thechas

Does the fan have the 3rd wire for the RPM sensor output?

Are you confident that the CPU fan is spinning at the proper speed?

If the answer to either question is no, you need a different CPU fan, or at least plug in a different fan with the RPM lead to the CPU fan socket.
(Make sure that the CPU fan gets power.)
(Never run a socket A system without a functioning CPU fan!!!)

Depending on how the CPU fan speed detect is set up, you may need either a 5000 or 7000 RPM fan to get past the BIOS PC health monitor.

Now on the stray wire.
I am assuming that this is one of the wires to the front panel.
Can you determine what this wire is connected to?

It could be for a reset switch, or a hibernate LED, and shares a common connection with another item.

Is there a case mounted speaker?

Chas

by itek4u

The TaiSol 12VDC Ball Bearing Fan has the blue RPM Sensor output wire along with the red and black wires. The fan appears to spin at full speed, but I think I will inform the PC owner we need a new fan that can produce 5000 to 7000 rpm. I hope this will resolve the issue so I can finish this system.

The green wire is one of the wires connected to the front panel. It is wrapped with the black and yellow wires with a tape that says 'power' on it. These appear to be connected to the power LED. I need to find out which pin, if its necessary, of the power LED jumpers this wire should connect to.

Thanks,

Mars

I do not see a system speaker.

by sgt_shultz

ah. welcome to Compaq land. you ain't in kansas anymore. visit the www.compaq.com website with your model number in hand. you will find my interesting things, including downloadable ROMpaqs that make bootable floppys. which is how you get at the BIOS to adjust and flash on many compaqs. all will be revealed. all is possible for us kansasonians.
also have a look for anything compaq'y in control panel.

by mocheeze

try this
try doing a F11 to get to Hardware moniter at boot up, once in bios go to hardware moniter and disable cpu fan RPM.

I have this problem constantly with compaq's and hp's. Hopefully it will work with the older models has well.

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