The entire surface of the eReader's internals is covered in a thin, plastic-like waterproof coating. Keep the following in mind as you continue disassembly:

While this won't hurt your device, removing the coating compromises the device to potential water damage.

The coating is brittle and can flake into many small pieces. Heating the coating helps, but working with it is still a time-consuming process.

Depending on your repair, you might have to remove the coating from ZIF connectors and their cables.