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Gateway laptop CPU fan problem


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#1 Blufx

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Posted 15 April 2012 - 06:55 PM

I was asked to replace the CPU fan on a Gateway MA7 model ML6703. It's a simple job on this laptop, but after I did, I found what the problem really was. When the power button is pressed, the fan spins up good, but after a few seconds, it shuts off and will not come back on resulting in eventually overheating. I found a discussion on another page that suggested the fan sensor didn't like the voltage supplied. Their idea of fixing it was replace the motherboard. I'm trying to save the lady some money so that's not an option at this point. I'm hoping I can somehow by-pass the sensor or even straight wire the fan. The fan is a 4 wire. Yellow, black, white, and red. They're no controls in the bios for the fan. I did reset the defaults in the bios and updated the bios with no change. Anybody got some ideas on this?

Looking back....I should have been a lot more specific when I said I wanted to be somebody.albertavatar.jpg


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#2 James Litten

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Posted 15 April 2012 - 07:41 PM

Hi

Did you replace it with the exact same part# fan (I think that one probably only comes with the heatsink included and not just the fan alone)?
This usually seems to be an issue when a different fan is used than the official OEM fan :(

The sledgehammer fix that I have seen in the past was to use the power from one of the USB ports but that made the USB port unavailable to the user and the fan ran 100% of the time.

James

#3 Blufx

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Posted 15 April 2012 - 09:19 PM

The replacement was an exact match. But the new fan and the old one did the same thing. I just kept experimenting with the connectors until found the controller.and left it unplugged. The white wire between the red and black is the controller. The fan runs full speed all the time now, the way they did in the old days. It don't make too much noise. I think she can live with that better that the cost of a new mobo.

Thanks for the reply.
Problem solved!!!

Looking back....I should have been a lot more specific when I said I wanted to be somebody.albertavatar.jpg


#4 ebnub

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Posted 28 September 2013 - 08:32 PM

The replacement was an exact match. But the new fan and the old one did the same thing. I just kept experimenting with the connectors until found the controller.and left it unplugged. The white wire between the red and black is the controller. The fan runs full speed all the time now, the way they did in the old days. It don't make too much noise. I think she can live with that better that the cost of a new mobo.

Thanks for the reply.
Problem solved!!!

 

Really old bump, sorry.  I just want to thank the op for sharing the find on this one.  I snipped the white fan wire on this old cranky Gateway and all is well now.  The sound of a fan spinning constantly is a lot better than an overheating laptop.






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