Headphone jack and sound cards?

Question

is it possible for something plugged into the headphone jack to ruin the sound card. i took a cellphone apart the other day i had found and i wanted to see if the speaker still worked. so i took a pair of busted headphones and stripped the wire, then pressed the wires against the copper contact plates on the cellphone speaker. played some music. now my sound doesn't work properly. it sounds all crackly and slow, high voices like girls are REALLY low and i can't even understand them.

Answer 1

This is primarily a computer related question, rather than home theater. I suspect that, if you post in the "Computers & Internet" forum you will get answers. That's where the computer experts hang out.