Wnr 3500lv1need the recovery software after failed dd-wrt build am unable to log in

I assume that you obtained dd-wrt from some website or other.

 

Alongside instructions on how to apply this alternative firmware for your router, there should also be details on how to backtrack and restore the stock firmware.

 

Netgear doesn't support third party firmware and there are not many experts in that stuff around here.