K3 Any hope for Kindle Keyboard?

I have a Kindle Keyboard that has been on the shelf for a number of months and now is unresponsive. I opened it up and took out the battery. The battery reads 3.84v, so it is not dead. Put the battery back in after a while and still unresponsive. I plugged it into my laptop. The charge light goes on, but no folder is opened. lsusb shows "Bus 002 Device 020: ID 15a2:0030 Freescale Semiconductor, Inc." unlike my Kindle Paperwhite which shows "Lab126, Inc." when plugged in.

Is there anything further to be done, or is this Kindle Keyboard dead?

Dave