PC does not startup, but fans run

20tonyl

Prominent
Apr 2, 2017
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510
Hello, I recently decided to move my old motherboard from my Lenovo Thinkcenter A85 to a new case. Everything fit in nicely and I connected all wires.

However the motherboard did not have any lables as to where the front board pins were supposed to be, and I coulden't figure out which pins are correct. The OEM power supply has a force boot button and when I hold it down it starts the fan, but the pc does not boot.

Im not sure whether the front board pins are broken or my motherboard is broken.

My motherboard is: IH57M
 


I tried, it still does not turn on.
 
remove everything you don't need for now, remove those front panel connectors, any cd drives, hard drives etc, use just the CPU, the cooler, 1 stick of ram, and graphics card (if required), see if it comes on then, this should at least get you to the bios, you can power it on by touching a small screwdriver across 2 of the front panel pins on the motherboard, when it comes on, you then know these 2 pins are the power switch pins, so plug that in, same applies to the reset switch, easy to test which 2 pins are for this, etc, anything left is going to be things like hard drive led, power led and speaker, not so important in the beginning.

If you can get to the bios, power down and start adding things one at a time, testing inbetween each, if you cant get to the bios at least with basics connected then you know you have another problem somewhere, time for the breadbox test, build your system with basics on a box out of the case.

is this your board ? https://support.lenovo.com/gb/en/solutions/pd014443 you can probably download a manual from here.
 


I am able to get the computer to boot up, however the monitor is not getting any signal from the computer, the monitor is working.

BTW yes that is my motherboard.
 


are you using on-board graphics or a standalone graphics card ?

did you do anything else like change the CPU, or was it just a straight case swap.

your original post was about front panel connectors, however, now you are saying that your PC works fine, just no display, that wont have anything to do with front panel connectors

 


I tried both with and without graphics card, there is no difference. I did not touch the cpu or the cpu fan, I just swapped the case.

Also, I can't just click the power button to turn it back off. I have to hold it for around 5 seconds.