Bricked

To render your computer useless, as useless as a brick.

Usually the result of tampering with the insides and doing irreversible damage. Bricking your hardware leaves you with a new paperweight. Can be the end effect of a faulty flash or firmware update, a modification (mod) gone bad or being struck by lighting, to name a few.

I tried to change graphics cards while my computer was running but I only managed to get my machine bricked.