Unfortunately, recently I have experienced several failures of not-so-old hardware:
- the Ultra 20 stopped to work (looks like power source problem),
- the SL-C760 Zaurus started to recharge very rapidly and now it refuses to start at all (no idea about the problem),
Also the Elektronika MK-90 refuses to start (there are some strange sounds, probably some recapping will be needed). But it is much older than the other machines (it’s from 1990).