My CPU fan doesn't work. When I turn the computer on, it gives me the HP blue screen then a black screen saying that the CPU fan is broken. When I look at it, it has a lot of dust. I am wondering if I should open it up and click the fan. I got an HP Pavilion, XP Home edition. I am wondering where the CPU fan would be located when I open it up.

If you mean a constant beeping, open the case and see if the CPU fan is running, check also that the heatsink is firmly attached to the board, this noise usually points to a n overheating CPU, if you get no activity on screen,it is because there is no signal being sent to the monitor. Do not operate the computer until you have checked the fan is working, you need to establish if there is power getting to the fan by testing with a multimeter on the motherboard cpu fan pins. If you are getting power, replace the fan, worthwhile removing and regreasing the CPU and making sure it is firmly in place.

If there still is no signal, replace CPU, but also try a different graphics card (faulty video will give 9 beeps).

After that, check the ram is firmly in place.

If you go to a computer shop and you can tell them wich type of motherboard and or cpu you have, they can give you the cpu fan you need. The replacement is easy but it depends on wich cpu you have. First of all i would check the power connection cable of you cpu fan to your motherboard. Are you sure the fan doens't turn any more?

if the fan is not on, the cpu may be fried and not working

Hi,
the dreaded Blue-Screen of death.
Usually caused by:- Ram Failure ( memory Modules )
CPU Failure ( Processor Failure )
Hard-Disk faulty, not spinning et,c.
Cmos battery fault.
Missing/deleted/corrupted operating System files.

Possible Solutions:- remove cmos battery, from Motherboard for 10 seconds and replace. ( eliminates cmos/bios errors )
remove 1 stick of Memory ( Ram ) and test individually ( eliminates 1 or More Faulty sticks Of memory Or Slots )
remove, CPU Fan/heatsink, remove CPU and re-seat, re-grease with Artic-Silver or similar ( thermal-Compound ) replace heatsink/Fan. test.

Hope this points you towards a Sucessful repair.

Mike @ Compurepair. No-Links No-Nonsense Just Good Practical Advise :-)

Now when you say blue power light, what are the rest of the lights doing, does the hard drive light flash, does the fans turn on, does the hard drive make it's spinning noise, if so you may just have a bad LCD inverter which is very common and about a 40$ part. you can test this by trying to hook the laptop up to an external monitor and see what happens.

1 MAKE SURE THE DATA CABLE IS CONNECTED TO THE CPU.
2 MAKE SURE TO TURN THE MONITOR ON.

could be the whole pc is fried :(

Well, in the second (Gege) case you have a bad windows. Repair using a recovery CD (one most likely came with your comp). Whyme, take it in for repair; someones been messing with your BIOS.

Here is the pinout for the wiring:


Pin Name Color 1 GND black 2 +12VDC yellow 3 Sense green 4 Control blue

In case this doesn't show...Black is Ground and Yellow is +12VDC.

Not sure if it will work w/o a Sense (Green) and Control (Blue) line though.

Are you working on battery without connecting the laptop to the mains power ? Please put the laptop on adapter power and recheck. Rajesh