My original C64 still runs (bought in 1982), as does my C128 from 1985.
My 1200s are all still running, but my A4000 has an audio cap gone wrong, resulting in crackly sound, not to mention the battery had leaked and has been replaced.
The A500s my brother and I have still work, but again one of those had a small problem with disks (partly down to the drive just getting dusty), as well as a small amount of battery leakage on the ram expansion (those pesky barrel batteries again).
Again hardware that failed on me was very modern (in this case an MSI Neo-FISR2 478 mobo bought a few years ago and died within a year), and the Xbox360 we bought had a DOA HD (which results in the RROD). Replacement machine the following day still works (now just over a year and a half old). Our first PS2 also died just before its warranty expired.
