I have a Sony Walkman SRF-M37V and the low battery indicator will not stop flashing. I have removed the battery and replaced with a new battery. Nothing. I then removed the battery and let the walkman set without a battery until the display went blank. I then tried putting the new battery back in and the same thing happened, low battery indicator will not stop flashing and prevents me from turning the unit on. Any help will be great. Thanks. John