that has happened to me and the light wont even turn on when i slide and release and it is frozen on a screen saver of anna christine with a whole bunch of black and white shapes covering part of it up.
one way to fix it is to hold the alt shift and the r key at the same time for 3 sec
another way is to open it and take out the battery
the last way is to charge it again or hold the button for 30 seconds even with no light
im so sorry about you kindle and i hope this helps