IMac no longer visible on network, Internet works fine

My home network has an iMac running Leopard, an iBook running Panther, and occasionally a Windows XP machine.
I was recently transferring files from my Windows machine to the iMac, when the Windows machine unexpectedly restarted, interrupting the transfer.
Since then, the iMac is not visible on the network, nor can it see any other machines on the network. There are no devices listed in its 'Devices' list. It's Internet connectivity remains unaffected.
Rebooting the iMac and restarting the iMac's Airport makes no difference.
Can anybody suggest a fix for this?
Thanks in advance... Paul
Message was edited by: nicepaul

There are no devices listed under Devices??? Not even you local HD?
Other machines are listed under SHARED on Leopard machines.
Have you checked into the preferences set up for sharing on both machines? Maybe something has been mis-set.

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IMac no longer visible on network, Internet works fine

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