Unfortunately; it does sound like your router has bitten the dust.
These days; buying pretty much any router will get you connected. There aren't really any compatibility issues these days. It's only once you get to the more expensive "super fast" connections that you might experience compatibility problems.
In the past I've used Netgear, Linksys, DLink and Belkin and all of these brands have been reliable in recent history.
Have a look at a couple of these links to see a few of them for sale:-
As I mentioned earlier - personally I wouldn't go for any of the "N" standard super fast boxes; but any of the brands I mentioned before should do the trick nicely.
Best of luck - and let us know if you need any further help