G3 B&W turns back on immediately after shut down.

Last weekend, I installed a new scanner/copier/printer/fax machine on our b&w. I believe my hubby adjusted the memory settings just before this without telling me. Ever since then, the thing turns itself back on every time you try to shut it down. So, we've been letting it run.
I have no idea how to fix this. Has someone hijacked our mac or what? Any ideas? Thanks.

Hi, JBear -
...my husband added another 128mb and then adjusted the settings. Could this be the issue?
Possibly, but probably not.
The usual cause for a machine auto-restarting itself is an attached USB device. This is most often a printer, digitizing tablet, or dongle, but can be anything USB.
There is a hardware instruction coded in the Mac that allows it to be started by a USB signal - that's how the power keys on keyboards that have them work.
The problem is that on shutdown some USB devices seem to either reflect a signal, or generate one, which the Mac interprets as a boot signal.
Since, based on your description, the last item added was the multifunction printer, I'd consider it as being the likely suspect.
Solutions can be -
• If the device is connected via a port on the keyboard, relocate it to a different USB port.
• Try adding a self-powered hub to the USB bus, and connect the device to it.
• Turn the device off before powering the Mac down.

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