- Is the laptop supposed to connect wired or wireless (quite common for a laptop)?
- Do those nice green LED's blink as they do in the 2 machines that work when connected wired?
- The issue is not clear. We have (1) "won't connect" in the subject line, (2) "says it is connected" and (3) "cable unplugged". One and two seem in contradiction. Same for two and three. he 'cable unplugged' message is quite common for a laptop if it doesn't have a cable connected. There's nothing wrong with that.
- So: what exactly is (1)? And what exactly is (2)? I don't think you have a speaking computer saying "I'm connected".

Kees