I hesitate to say this, but I've never had a console truly break.

I still have my original SNES. My GameCube had the external power source fail, but the system itself works fine with the new power source. My PS2 is cranky, but does work after a few minutes to warm up.

If I could find my original Gameboy, I'm sure it would be dead, but the last time I saw it I put new batteries in it, and it fired right up.