Per my last post, my Bambu AMS Lite, rebuilt into an AMS Micro, fails to push filament to the extruder. I thought this was related to retracted filament being unable to re-feed but this was a red herring.
The AMS is unable to load any filament at all, through any slot. The spool spins freely, the filament leaves the spool and enters the AMS module straight-on, and the PTFE tubes are in good condition and not too long.
I can manually push the filament into the extruder, but the AMS seems to stop just short of reaching the extruder and doesn't push all the way.