Help with Cisco 1921 router-not booting

I had got a Cisco 1921/K9 router and sys led started to blinking, then I connected the router with a console using Hyper Terminal, and it looks that there is no file for booting.I need some help to rebuild it.I also want to know more about this moderm,my friend suggest me to visit .Does someone who know this website ?
Well you're 2 for 2 now.
Bring on the moderators please.
That web link gives you a trojan. Beware.