This just happened to my 880 as well. The remote had been rock solid for years, but it recently started spontaneously locking up, forcing me to remove the battery and then reinsert it. This kept happening with greater frequency, until this morning it finally appears to be down for the count. I thought it might be the battery, so I bought a new one. It didn't help. Just like the above poster, I cannot load a new file to the remote. Does anyone have any suggestion?