I have used my 902 for 12 months or more, with no problems.
As recently as yesterday, I downloaded a few more books from Calibre.
The battery was fully charged, and everything worked fine.
Today, it will not start.
I press the on/off switch, and it simply stops at the Welcome screen (the one with the kids' alphabet soup all over it).
That is also as far as it gets when I connect to the PC: the device is not recognised by Calibre, and neither the device nor the SD Card shows

up in Explorer.
I cannot get through to the Main Menu page.
I have tried resetting it, both with and without Power On, and with and without it connected to the PC, with no success.
Does anyone have any suggestions?
https://www2.mobileread.com/i/smiliesadd1/help.gif