Flight Deck not displaying gear indicator
Bought a SC-6501 Shimano Flight Deck computer used off eBay last week. After installing and following the setup instructions, I notice that the gear indicator never comes up. Even shifting gears (left or right ST-7700C levers) does not give me the brief gear combo display.
It's not so much the gear indicator I care about, as it is the virtual cadence. Since neither front or rear gear are indicating, I would assume that the levers and the sensors are OK, and it's something more common to both like the actual head unit.
Any suggestions or similar problems out there?