Hello, My G4 MDD with dual 1.25 Mhz processors that can boot up natively in OS 9 is recently beginning to freeze up upon boot up mostly in OS 9, in particular when I switch from Tiger to OS 9 and restart. I switched to my back-up external drive and got the same freezing problem. Zapping the PRAM didn't solve the problem. Do I have a hardware problem? Thank you, Bruce Ryan Nakamura also known as Scot E. Nakamura