I de­cid­ed to bring my of­fice PC in­to the XXI cen­tu­ry by adding a few USB ports to it.

I turned it of­f. I plugged in the board. I start­ed screw­ing it... and dropped the screw in­side it.

That has hap­pened a bil­lion times be­fore, so I'm not too wor­ried... un­til sud­den­ly the com­put­er turns it­self on, and a aw­ful smell comes from the ISA end of the mobo, along with acrid, black smoke.

I pull the plug, and it does­n't work. It seems to boot, but it makes a con­stant beep­ing sound.

Key­board er­ror.

I put an­oth­er key­board.

It all work­s, ex­cept the pow­er LED is now al­ways on as soon as I plug it. But the com­put­er is­n't. When I press the pow­er switch, the pow­er LED gets brighter, then it start­s.

I won­der what ex­act­ly I burned :-)