I have not used my 920 remote in some time and the batteries died. I have tried several sets that I am sure are reasonably strong. When I put the second battery in the blue light at the top of the remote starts flashing. If I turn on my 920 and attempt to use the remote nothing happens. I have tried all the buttons on the remote. None of them do anything. The battery compartment is clean - no corrosion. Any ideas would be greatly appreciated.