Resolder ant-like capacitor?

Hmm , a single colour stripe in the centre , doesn't sound like a colour coding system. Desolder one from a working board and measure it with a capacitance meter. Voltage rating should be around 25 V unless it's part of a dc to dc convertor section .

I work on MB's everyday, and have to replace various components such as you describe (ant like). They do have standard sizes, and power carrying capabilities. Your cap may be either an "0402" or "0603" size. The values are NOT marked any way on the caps (they are on resistors, if you have a strong enough eye loop to read them). Since values range from 3pf to 0.1uf for these chip caps on most MBs, it is probably not a good idea just to grab one that "looks" the same, as a

If you are very fortunate, it was only a "noise cap", and the MB will probably work fine without it. However, it could just as easily be a critical cap, without which the MB will be rendered into a fancy door-stop.

You might be able to find out the value by emailing tech support of the MB manufacturer. Once you know the value, you can buy a replacement from a place like Digi-Key

Good luck!

Actually, it is not a stripe. See the picture

In my experience, caps of that type are either .1uF or .01uF.

Probably work fine without it.

Mark Z.