I have 2 of the mirror drive door PPC G4 867mhz macs, both with 1.5g memory. One is used for our kids and the other I use as a video convertor for analog to DV videos. Both have developed the exact same issue albeit 7+ months apart. For the kids, it's not an issue. The issue is when I booted up my G4 today the date and time reset back to 1969 and my firewire ports are dead. I have tried multiple firewire wires and devices to no avail. I use my old PPC with a canopus external video convertor which has worked great for 5+ years. The exact same thing happened to the exact same model that my kids use upstairs-->same date issue, same firewire issue. I have reset the PRAM, doesn't help. When using "about this mac", firewire says "Maximum Speed: Up to 400 Mb/sec", but no device listings even with the canopus and a fantom drive hooked up to it. If I replace the battery, will the firewire start working again? I assume the date/time would work. This old PPC has been a workhorse for me and I need the firewire ports to keep it viable for my needs. I have a mac mini for my work, but do not want to tie it up for importing and processing video that the PPC does just fine. Any ideas?