Poxy router

It appears that post three (of 4) has given up and doesn't recognise when it has a computer connected to it

Take the plug out of port 2 (pc says "netwrok cable unplugged") and plug it into port 3 nothing happens. Plug it back into port 2 and instantly the PC says "network connected, 100.0 Mbps" etc.....

Bastid thing....