I'm using a MX-850 and a MRF-250 in a classroom. I have one flasher on the projector, but the rest of the gear is in a tower and gets its IR signals from the Front Baster on the MRF-250. After several years of faithful service, it's as if the Front Blaster is not emitting IR signals. (The LED indicator light blinks whenever it's supposed to, indicating the IR signals are being sent, but the gear in the tower doesn't respond!)

The projector gets its signals from the flasher just fine.

This event happened to coincide with the MX-850 needing new batteries.

Does anybody have a guess as to what might be wrong, or anything I can do to try and fix the problem?