seems like an power issue you had with the cable modem (has it been fixed, the ready light going off? as second post seems to look like it was fixed with th edit)
could be that the cable modem is not likeing power spikes on the line or when power company switches grids , use an belkin surge protector (seem to be the best), get ones with green light {protection working if its not lit you need to replace it} and red power light as they have lightening suppressor on them and can filter out spikes, best to norm use surge protected on every thing that is pluged in apart from heavy duty or sudden loads like hovers, heaters as they shorten the life of the protector quite fast
---- other but you may have all ready done the below ----
as its an belkin router make sure the router is upto date more so if you have the first ver of the router as that not had official update for more then 1-2 years
if you have ver 1 of that router go here
http://www.belkin.com/uk/support/art...id=9238&scid=0
if you have ver 3 or 4 you have to use norm updates for the router
http://www.belkin.com/uk/support/art...d=10288&scid=0
download the file to desktop and unpack the update make sure your using an wired computer and log onto the router and do the update it
(came on here just to ask about 50mb bb i have
i post an new topic for that)