i'd be suprised if it was broken, unless you did it some physical damage.
Motherboards have all sorts of protection built in, so if you have only just done this, kill all the power unplug the psu and switch it off. I'd remove the CMOS battery and leave it for half an hour, and basiclly wait for all the capacitors to fully discharge, and hopefully it will reset.
Then plug everything back in and you should find its fine.