So, I have a Kindle Keyboard (the last generation thereof) that's suffering from a broken screen (stuck image over ~1/4 of the screen, random lines over ~1/2, and feeble attempts at updating are ...

One used to be mine. Its battery appears to hold a charge, but it won't reliably turn on, and it will shut itself off for no goddamn reason and refuse to reboot. I suspect there is some problem with ...