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Laptop Repair Blog

Cheeky Rodent Knocks Out Internet Connection

house mouse

Got a call from a customer the other day saying they had come in in the morning and had no Internet connection on either of their two PCs in the office. It was working fine the day before, but this morning, nothing.

They had already followed the usual troubleshooting steps: they had reset the router, power cycled the network switch, so I went out to site to investigate...

First, check the router: ADSL light on and steady, connect my laptop to spare network port, it picks up an IP address, and we're talking to the outside world no problem at all.

OK, try connecting the laptop to the network switch: no IP address assigned, no connection.

Suspecting the cable linking the router and the switch, I disconnect the cable from the switch end and connect it to my laptop - nothing. Try a different cable and it works fine.

Pulling out the faulty cable from behind the desk/filing cabinet and testing it with a cable tester confirms the fault: pin 2 is not connected through. Inspecting the cable more closely reveals tiny teeth marks where the outer sheath of cable has been nibbled away.

Mentioning this to the customer, it turns out they had had a mouse in the workshop a few days ago, a cheeky one who kept popping his head out to say hello. They'd caught him and released him outside; obviously he decided it was too cold out and came back in.


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