My display is black

[busweb]

Hi. I do need some help here. My desktop started to have a problem. Anytime when I move it, the mouse freezes and when I restart the computes, the displays goes black. If I move it again, usually restarts after 2-3 tries.
Anyone knows what it could be?
Today I bought a new mic, and when I plugged it this happened again. Make me crazy sometimes.
Thanks a lot for help.

 

[carnageX]

If it shuts down by itself, first thing I'd suspect would be the power supply.

 

[RogueSeven]

did you try unplugging the mic?

also, i guess a better way to see if it is the psu or not, unplug things like graphics cards, sound cards, cd drives and hard drives that arent needed. if it works with less things taking up power then your psu becomes the problem more then likely.

 

[busweb]

Power supply works fine, the computer opens, I can heard the hard disk working, only the display is dead.
I did try unplugging the mic. I will try to unplug all the cards and see what happens. Thanks for suggestion.