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Windows 7: laptop fan issue

03 Apr 2013   #1

Windows 7 Home Premium SP1 64bit
laptop fan issue

Lenovo B570 1068AHU -- upgraded to 8GB RAM

I heard a noise coming form inside my laptop which disappeared after a few seconds. It was a very rapid clicking noise which sounded like a spinning object contacting metal. My best guess is that the fan was rubbing the heat sink. Since the noise, the fan does not push air out of the exit vent as hard as it did previously. CPU temperatures which normally ran at about 105-120F now run at about 140F.

I have tried blowing out the case with compressed air with no noticeable change. Using Lenovo's field service repair manual as a guide, I have attempted to disassemble the laptop to gain access to the fan. I ran into a problem at the step where the keyboard must be removed. I was applying enough pressure to cause the plastic case to bend. I stopped at this point of disassembly in fear of breaking something.

I have found only one reliable local tech who is willing to go inside the laptop for repair. He insists that I provide him the fan at the time that I bring the laptop to him for repair. (He says that he has been burned every time someone has brought him a laptop without bringing the part(s) when bringing him the laptop.)

I am concerned about purchasing a compatible fan without the ability to see the existing one to get a part number. My research attempts have not returned anything I am confident is the correct part. Online retailers claim that they either do not sell laptop parts or give me two part numbers and cannot tell me which is the correct one. ( P/N 60.41H13.004 or P/N 60.4IH06.002) Lenovo tells me that they won't sell me the fan or offer technical assistance unless the computer is under warranty, or I am an authorized factory service rep. Neither applies to me.

I am on the verge or starting a project which promises to use most of the available processors' capability and available memory. I am quite sure this will generate more heat than under normal use. I would like to resolve the fan issue before beginning the project.

any suggestions?


My System SpecsSystem Spec

04 Apr 2013   #2

Windows 8 Core X64

Doesn't sound like a reliable tech to me. Any I know would look at the computer then IF the fan is defective, either replace it or ask you to buy one and then replace it. I've never heard of one that wants a part ahead of time that may not be the problem.

Ask the tech to disassemble the laptop and then give you the part number of the fan if it actually is defective. It will take longer that way but at lest you will be sure to get the right part.
My System SpecsSystem Spec
04 Apr 2013   #3

Windows 7 Home Premium SP1 64bit

Yea, the problem is that most of the independents in my area are techs in name only. Since the economy became soft it seems like everyone who knows how to run a security program or plug in an external drive is doing business as a tech. The only long time shops in town have a reputation for installing used or refurbished parts and charging new prices. I avoid Best Buy and the other corporate store fronts with a passion. The very nature of a corporate operation requires higher prices to support the administrative levels of the company. The quality (or lack of) does not justify the prices they charge. The guy I mentioned tries to stay away from laptops because he claims to have been burned by the owners too many times. He has a five star reputation on desktops and servers.

I tried Lenovo again, and after abandoning the nice guy talk, I got them to provide me with the correct part number for the fan and heat sink. I have found several new ones available online now that I have the correct part number.

I may make one more attempt to safely remove the keyboard before turning this machine over to someone else for repair.
My System SpecsSystem Spec

05 Apr 2013   #4

Windows 8 Core X64

Good luck!
My System SpecsSystem Spec
05 Apr 2013   #5

Windows 7 Home Premium SP1 64bit

My System SpecsSystem Spec

 laptop fan issue

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