For what it is worth, the first OFA 7200 remote that I got (a couple of years ago) worked fine, until I tried to program in my Laser Disk player code. I tried the code, but to no avail. I even "searched" for the code. Nothing. All the other devices worked fine. So I took it back, exchanged it and the new one programmed fine.

The point being, if the 15-1994 is a 7800/7200 or whatever in disguise, maybe same problem????