hi there thank youfor your helping tutorial.

i just bought some used Kindle in order to buy at my shop. but i have a problem with some Kindle that i disassembled in order to have some spare parts and especially with the screen.

even after removing the screen it will stay frozen, even if i change the motherboard with a new one it will stay on the last screen shown.

Might you give me any explanation about the issue? and is that a way to reset the screen in order to use it as spare parts for other kindles?