The patio GFI may be in the little access door by the side of the entry door, if you have an entertainment system.
It could also be that the outlets (or at least the first one in the string) has a bad connection....or even a bad outlet (remember, these are purchased by the mfgr and are often the cheapest they could find, to save money)
If you pull the plate, and inspect / tighten the connections, you may be back in business:)
Get a multimeter, and once you have the cover off, check to see if you have voltage. I would have the breaker off (or disconnect shore power when working with it). If you have voltage to the outlet, but not "in" the outlet, replace the outlet(s).
Have you had any issues with mice/squirrels chewing wires? They can do a job on these things!!
Good luck:)
