have you tried resetting the remotes?
loosen the 4 screws that hold the cap to the remote box and hold the program button on the right side, (its red) for 3 seconds and then hold down a button on your remote. The remote will re-learn the signal and you should be good to go, if everything else is working normally. This loss of memory can be caused by a loss of power.
It happened to me and that is what fixed it.
I now have the new magsync remote and you can reset the remotes by just waving them in front of the box.
If that doesnt work then start checking fuses.
Hope this helps