Failure of the iBook to connect with either of two other Macs that connect happily to each other argues either bad hardware or bad software in the iBook.
What OS in the iBook? Can the iBook, if connected to the Web directly via the modem/router, get time from an Apple server (OS 9 upwards)? If so, that argues a software rather than a hardware problem. How is your ethernet connection configured, either in Control Panels::AppleTalk and ::TCP/IP (OS 9) or System Preferences::Network (OS X)?
de
What OS in the iBook? Can the iBook, if connected to the Web directly via the modem/router, get time from an Apple server (OS 9 upwards)? If so, that argues a software rather than a hardware problem. How is your ethernet connection configured, either in Control Panels::AppleTalk and ::TCP/IP (OS 9) or System Preferences::Network (OS X)?
de