monitor not working right

[prelude beast]

I was hooking up my newer computer it about 2 yrs old . So i turn it on and was working fine monitor and computer i went to plug my speaker in the back of the computer it start making funny noise like 4-5 times and freeze up.So i hit restart button on the front of the computer. Computer start to come back on mad that funny sound again 4-5 times but the still on but the monitor only comes for like 4 sec and than either it cutting off or just going black can some one please help me.

 

[veedubfreak]

Sounds like the speaker is shorting something out. Unplug whatever it was that you plugged in and see if that fixes the problem.