A friend's iMac has been used online for years. Recently, the internet was down for a few days. The ISP's helpline proved fruitless. Then, another friend - who knows about computers - felt it was modem that was defective, so he swapped the modem. The result, allegedly, was that the replacement modem became damaged. He then tried a third modem, and even that modem became damaged too. (I am just relaying the story, so I don't have more details). Question: is there such a situation where merely attaching a modem to an iMac can damage the modem? I've never heard of such a thing. But, if others have, does the problem lie with the iMac or even the internet line? All other peripherals e.g. scanner, attached to the same iMac are working fine.