From the looks of it, if it's the positive/anode lead, it just connects to the pad right beside it for R510. The cathode or negative lead has a lot further to go. If you look under C21 there should be a little via there, you could jumper over to that. I'm looking at the D, not sure which rev you have but they all should be pretty similar for the LED circuit.
There night be some repair guys on here with better fixes, but these are generally easy fixes if you take your time.