I have 2 old white 2006 iMacs, a 24" and a 20"
In a recurrence from a week or so ago, the 24" woke up with no connection. After a reboot, it was OK. But today, the same thing. Network diagnostics said to reboot the modem, which I did although it seemed fine. Rebooted the iMac as well. Still nothing. Went into the settings, said no IP address, but on further poking doesn't see any WiFi networks at all. Says ethernet cable is disconnected although I plugged and replugged it.
Hmm. Connected the 20"-WiFi and Ethernet are fine (I removed the cable from the 24" and plugged into the 20")
Seems to me like something in the hardware is getting fritzy??? Any ideas? Otherwise, the machine seems to run fine. I do NOT want to get a new, reflective-glass-screen iMac, since this thing has a window behind it. And I'm not really too keen on getting a used one from eBay and tricking it out like this one...