If you stick the bad cf card in a cf reader which is not the bookport, turn on hidden files, and do a directory listing, what do you see in the root of the card? It sounds like the bookport thought you had part of a firmware update on that card, and tried to upgrade itself. This failed, and now your program flash might be corrupt inside the bookport. What I'd try is: 1. Look in the root directory of the offending cf card, as I suggested above, and see if you see any files beginning with the letters "bp". If so, post what they are to this list, and we'll let you know if they should be deleted from that cf card. 2. Try resetting the bookport with the 2+b keys and see if it comes back to life. 3. If those fail, take out the batteries and put the bookport on a shelf, without its batteries, for a day. Perhaps that will clear any corruption that wasn't quite written to the permanent storage inside the program flash. 4. If that fails, break out your checkbook and pay the reasonable repair fee APH charges to revive your device. If it's less than a year old, the fee is even more reasonable. :) Good luck. Hopefully step 3 will be as far as you need to go.