G4 very sluggish and dock icons disappeared

I have an older G4 with a Sonnet 1.4G card in it. Lately it's been acting up. It was off for a day, and when I booted tonight, all of the aliases in the dock that were not there by default had disappeared. It wouldn't run disk utility or cocktail from the boot disk. Tried running TechTool on it. Same issue. Booted from the OS 10.4 installer and ran disk utility on it, repaired permissions. No disk issues, but a few premissions got repaired. But still no love.
This machine has an Ultra-ATA card in it and a 300Gb Seagate, along with an 80G boot drive. 1.5G RAM. An old UltraSCSI card. A recent Firewire 800/400 card, as the firewire drives attached to it were not mounting properly. In other words, it's been acting more and more squirrely over the past few weeks. Maybe it's just its age. Maybe it's the six 250G Firewire drives.
G4 450Mhz with Sonnet 1.4Ghz upgrade 1.5G RAM Mac OS X (10.3.9) Firewire buses (2), ATA PCI Card,
G4 450Mhz with Sonnet 1.4Ghz upgrade 1.5G RAM Mac OS X (10.3.9) Firewire buses (2), ATA PCI Card, Adaptec UltraSCSI

James, have you checked your battery? I've had two machines suddenly start to act up in odd ways such as; all settings revert to factory defaults, "fountain of youth effect"on date/time (i.e. "1/1/1904"), once I couldn't get it to power up. I found that replacing the 3.6v battery fixed everything.
I'm not familiar with the sluggish symptoms or failure to run DU, but if you can't think of anything else, a $7 repair effort is an easy place to start. (and if it's not the problem, you can probably re-use the battery in a camera).
Dave

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G4 very sluggish and dock icons disappeared

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