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CPU Fan Starts Stops, repeats, no beep on boot. (Solved)

CPU FAN CPU fan start stop No beep on boot

Best Answer jdx_ , 21 May 2017 - 01:00 AM

So sorry to keep you waiting. Figured out that the fan was not functional. Replaced it and everything came out fine. I was just over thinking everything. Thanks so much for your information. I'll b... Go to the full post »


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#1
jdx_

jdx_

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Mobo: MSI Z170A Gaming M5 LGA 1151
CPU: Intel Core i5-6600k
GPU: EVGA GeForce GTX750
CPU Fan: Enermax ETS-T40F-BK 120mm Twister Aluminum LED


This is my second build and I am following NewEggs YT video on how to build a cpu. While doing the boot up with the mobo out of the case and the cpu, gpu, and cpu fan installed I did a boot up and the speaker made no beep and also my cpu fan would start then stop then start etc...also sometimes it doesn't start at all. Mobo code at the bottom right said Ab. I have zero idea as to why this fan would not work. Any help is appreciated. Thank you.
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#2
iammykyl

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Gday jdx  :welcome: 

Teh AB code is, BIOS initalization, started but stops.

 

Need to do a basic test.

Wit the MB on it's empty box.

Turn off the PSU.

Remove the GPU, RAM is installed, any other cards, all connections except the following.   Checking each one to make sure it is properly seated.

 

CPU and heatsink/fan, fan plug to CPU#1. (top left of the DIMM slots)

24 pin 24v main power and 8 pin 12v Auxiliary. (JPWR1~2: Power Connectors) page #36.)

Connect the peeper, ensure + positive is correct, (JFP2 page #38)

 

Turn on the PSU and short out pins 6 and 8 (JFP1 page #38.)

 

The PSU fan starts, (may stop if thermally controlled)

The CPU heatsink fan should start and keep going. and you should hear 3 short beeps, if not.

Overheating because no thermal paste, improper heatsink installation.

Faulty CPU or MB.

Bent pin/s in the MB socket.

 

If OK.

Turn off the PSU, > install RAM in the correct slots, > test again, 

Beep code may change, or, you may not hear any beeps, but if it keeps going.

Switch off the PSU.

Add, mouse/keyboard, connect monitor to the MB video port and test again.

If still OK, carry on with your build.

 

Good luck. 

 

 

 

 

 


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#3
iammykyl

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Gday jdx.

How is the troubleshooting going, up and running yet?


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#4
jdx_

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✓  Best Answer
So sorry to keep you waiting. Figured out that the fan was not functional. Replaced it and everything came out fine. I was just over thinking everything. Thanks so much for your information. I'll be sure to save it for my next build!
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#5
iammykyl

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Not a problem, :thumbsup:  glad you got it sorted.

 

 

You are very welcome. :rockon:


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