I had a recent similar issue when, after a battery replacement, my Homelink did not work. The green light never came on, let alone flash, when trying to program it again. After many frustrated minutes I noticed the analog clock had not been reset after the battery replacement, but when trying to adjust it, it wouldn't move. That put me on to fuse issue, but which one? Found it--a ten amp one located in the fuse panel by the driver's left foot. And I did NOT have to reprogram Homelink. Previous info had been saved. Image: