i'm having a problem with my desktop computer's LAN/ethernet connection.
i used to have an ADSL modem/router for my internet connection, which worked fine with my ethernet port. it broke a little while ago, and so i've been using an old DSL USB modem for a while (i mention this because it used to work, but to show that i haven't tested it for a while). I just got a new modem/router but i can't seem to connect to it. the ethernet lights come on on the PC and on the modem/router, but it constantly says connection refused when i try to connect to the router's IP address.
I thought it might be the modem, but I can connect to it with no problems using the same CAT5 cable plugged into the ethernet port on my laptop, or by wireless on my laptop.
the only other way i could think of testing it, was to connect my laptop to my desktop using a CAT5 crossover cable that i had. this doesn't work. on the laptop, i get a 'limited or no connectivity' error message. if i look at the status of the LAN connection on the laptop, it says unable to obtain IP address. to be honest though, i'm no expert and i'm just trying things that may have worked in the past. i've tried repair connection, when plugged into the modem/router; which fails. but also from the laptop when connected to the desktop on a crossover which fails (this time, it works from the desktop end!)
it seems to me as though the problem must be on the desktop computer's end, either physically to do with the port, or some kind of configuration issue. again being honest, i'm lost for what to do.
help fixing this would be very much appreciated!