Screw stuck in the motherboard please Help!!

Hi everyone,
I recently started to build my first computer from scratch. In the process of assembling my computer I screwed a wrong type of screw in the screw hole on my motherboard. So now I have this one screw that wouldn't fit in all the way and it also wouldn't come out. I tried to turn the screw counter clockwise for about 720 degree turn ( I mean 2 full rounds) then I hear this loud *clack* metallic noise and it seems to reset it position somehow making me unable to extract it out. I kept turning counter clockwise again and again, but it only make that clack metallic noise and the screw still won't come out.

I tried to use a pliers but I'm unable to get a firm grip at the screw head since it position was too near the ram slot and some other motherboard component, plus the screw head was somewhat round so the pliers cannot hold it firmly. I'm out of solution please help, my motherboard is an ATX P8H67-V so I guess that's standard size.

If you are talking about a motherboard mounting screw, you will need to gently grasp the metal riser under the board with a small needle nose pliers and hold it while you gently remove the screw. It is jammed in the metal riser and when you turn it the riser is backing out of the case.

Be careful and gentle doing this or you could damage your motherboard.

This is like any other screw that wont come out... Use a small flat screw driver under the head of the screw and apply lifting pressure while unscrewing it...

Or do as the previous pêrson mentionned... access the rear of the motherboard to old the brass end of the standoff... the screw is stuck in this brass standoff

Not if you do it properly and the screwdriver doesnt slip

It certainly could, depends on how lucky you are today.

I expect that the noise you hear is the standoff spinning and hitting the case, as it is probably unscrewed from the case already.