Power Mac 7600 enters low power mode when connected to FireWire hub

beigebox wrote:

I have a 6 port Belkin firewire hub with it's own power adapter. There are other computers connected to this hub, all powered off.

You've got multiple computers connected to the FireWire hub? The hub is only intended to provide extra (powered) ports between one computer/host controller (via the hub's input port) and the peripheral devices (via the output ports). To avoid confusion, some hubs specify the port to connect to the computer, while the others are for the peripherals. Are you using a Belkin F5U526-APL hub? If so, there doesn't appear to be a designated "input" port on the housing. The Belkin F5U507 USB 2.0/FireWire hub has designated "to computer" ports. I have an older, Belkin 4-port, powered FireWire hub and the port intended for connection to the computer is clearly marked.

For starters, what make/model is the FW card?

There are other computers connected to this hub, all powered off.

Have you tested with the other computers physically disconnected from the hub? Even if powered off, they may be drawing a bit of power. Desktop Macs of that vintage had a bypass around the power supply that let a 5V trickle current past the shut-down PS to maintain settings and preferences. I've never owned a Windows computer so don't know if they had a similar function. If only turned off, other computers could still be drawing a little power.

Have you cleaned the contacts on the FW card and its slot?

I may be the only other person here who still has a working 7600/132, but the only card in mine is an old ATI video 16MB card.

Just remembered. The 7600 has a daughter card as well as PCI slots. You might try removing and reseating the d-card to freshen its contacts.

We are traveling right now so I can't run down the hall to check for other stuff that might affect the 7600. Don't give up yet!