Attemps to gind but no beans seem to get through Then the display indicates 'add beans' although it is full

Machine thinks there are no beans because it is not grinding. Most likely the grinder is blocked. The common causes are a small foreign object, a stale hard bean and moisture (either from water spillage or moist beans). The first thing you should do is vacuum ALL the beans out, set it to the coarsest grind setting and run the grinder a few times ( with no beans). Then put a small amount of fresh beans (make sure they are dry and not from fridge or freezer) in and try again. Give it a few goes. If it still wont grind have a good look down there, if it looks wet let it dry out for a while and try again. If none of thes easy tips help you will have to remove the top grinder burr and clean both burrs. Good luck.

If you hear the motor whir but the grinder does not turn then -most likely- the belt from the motor to the grinder shaft is broken. you have to remove the grinding assembly, then remove the screws underneath it that hold a metal plate in place and look inside. if the belt is indeed broken just get a replacement and put everything back together. make sure you do not disrupt how the cogs (white gears), are put together because this will throw the fine/coarse settings off of alignment and then it is a pita to figure it out. Good luck, message me if you need help (R1100RA com).

I can see inside my grinder, that it is largely free of grinds but it makes no attempt to turn.That fact, combined with a high pitch motor noise (like a motor, unencumbered by having to turn cogs) makes me think that some linkage has snapped, inside the grinder housing. The housing is a tough white plastic enclosure, with the motor secured towards the rear of the machine.
Question - has anybody been inside the grinder housing and, can the unit be DIY'ed?