Question about Lexmark X502N All-In-One Laser Printer

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Warning: CPU Fan is Locked!

I have been receiving this message .. what does this messgae mean? and how to solve the issue

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Wow, after hours of searching I found the right connectors for the fan since it comes with bare wires when ordered from (The fan to order is a 24v DC Y.S. Tech FD245010MB.)The connectors are from JST America and can be ordered from

Part 455-1126-ND (housing that takes pins spaced 2mm apart)
Part 455-2148-1-ND (pins)

You have to order at least 10 housings and 100 pins but all of that costs about $2.50.

You can also order the crimp tool but that costs $1,300. I'll just use a needle nose pliers.

Good luck!

Posted on Mar 20, 2010

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You have tor replace the fan.
Order here:

Posted on Jan 11, 2010

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Cpu fan problem

If you plugged the replacement fan into the power supply instead of the "male plug on the mother board" you will get that error message. You need to find a fan that has the female plug for the mother board. It solved my problem.
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1 Answer


Hi there!
AMDs (some of them) have Overheating issues. Your default BIOS is set to protect the CPU chip in case of overheating. It will do so by shutting down the computer.
You can hold "delete" key on boot to enter BIOS. Go to "PC Health Status" or " Hardware monitor". Here if you see temperature exceeding 60 degrees or more, this mean it's OVERHEATING!
Now the first thing is to check if your CPU fan is running & is well secured with the lock. Try to move it to see if it's loose. Secure it properly to solve. If it's not running, you'll need to replace.
However if it's not the problem, remove the fan & its aluminum heat-sink with CARE. Then re-seat the heat-sink properly.
Note that a poor contact of CPU & heat-sink = Very Hot CPU & cold heat-sink.
If it's not the case, therefore remove the heat-sink & clean the old thermal paste on it & the Cpu chip also.
Apply proper thermal grease e'g Arctic Silver.
If the above does not solve the issue, you'll need to replace fan. (pls check with another one before buying a new one if possible)
Ultimately if the issue is not solved by the above, this means that the heat sensor on the motherboard is faulty. Here motherboard needs replacement or warranty services.
Hope this advice really helps you. Please remember to send us your valuable feedback as it's very important for us!

Mar 05, 2010 | Biostar NF61S MICRO AM2 SE...

1 Answer

CPU fan locked

Wow, after hours of searching I found the right connectors for the fan since it comes with bare wires when ordered from  (The fan to order is a 24v DC Y.S. Tech FD245010MB.)  The connectors are from JST America and can be ordered from 

Part 455-1126-ND (housing that takes pins spaced 2mm apart)
Part 455-2148-1-ND (pins)

You have to order at least 10 housings and 100 pins but all of that costs about $2.50.

You can also order the crimp tool but that costs $1,300.  I'll just use a needle nose pliers.

Good luck!

Oct 20, 2009 | Lexmark X502N All-In-One Laser Printer

1 Answer

My Lexmark 500n has a warning message [ WARNING: CPU Fan is Locked ]what does that mean?Seems to print fine but the message is ;( Anybody know what I should do?

Might be some foreign debris stopping the cpu fan from running and cooling the cpu.

I wouldn't leave this problem for long since a fried cpu will mean the end of your printer

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Warning: CPU Fan is Locked!

You have a fan that is not working.
Just be happy that is isn't the photoconductor.
What kind of computer is it?
If a fan isnt working it is not the end of the world,... Front fans go all the time and are basically useless anyway.
If it is hampering our ability to print lemme know and I will delve further into this.
I will need the make and model of the computer/printer.

Jan 15, 2009 | Lexmark X500n Color Laser All-in-One...

6 Answers

CPU fan fail or speed too low


I bought the same motherboard this past year (used) and installed it with AMD Athlon 64 fx-57, Antec P180 case, 550 w power supply. I had the case cover off to check the fans when I first fired it up. The AMD oem cpu fan hesitated at power on for a few seconds, which worried me. It started spinning normally and I then shut the system down and waited a few minutes before restarting it. It spinned up fine so I put the cover back on. I started getting the same error you mentioned, so I updated the BIOS to 1013 version. That didn't solve the problem. I ended up disabling the warning in the BIOS as I got tired of seeing it, as I could see the fans were all spinning and the CPU temperature was at about 26 to 34 on cold boot.

I recently checked on this problem and seems many others with this board have this problem. One fellow said he mailed off a question the the problem to ASUStek and they replied that it is just a glitch, that the fan is "smarter" than the BIOS, as it will hesitate to spin fully at start up if the CPU is cool. The suggestion was to disable "Q Fan Controller" in BIOS. I did and don't get that warning.

As for the yellow question marks under manage in Windows, you need to install the drivers for all of those devices, and they will be on the disk that came with the motherboard. I use the latest drivers from the ASUS site, but the only one I couldn't install was the ACPI ATK 0110 Virtual Device that came out in 2007. When I try to unpack the .rar file it says Corrupt Headers and refuses to use the driver from that file. So, I use the driver from the disk.

Apr 12, 2007 | ASUS A8N-E Motherboard

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