death of mini

A few days ago, my ancient mac mini (PowerPC G4) hung during OS upgrade. Can't boot up anymore. Using the original OS X installation disc can't recover the system. The recovery also hang in the middle of installation.

Last resort: crack open the machine and tried to replace the RAM. Actually it is sort of upgrade (from 512M to 1G). Mystically, the re-installation finally worked!

The moral here is... "if anything can go wrong, it will"... -_-... who would suspect the cause was a faulty RAM module... after the machine has been running for many years...