Hi there guys! Looking for some help!

I am trying to install the v4 Envy Sapphire Backlight to my Gameboy DMG.

I followed the http://www.nonelectronics.com/tutorials/tutorialsmt.pdf but still haven't had success.

Result (see 2nd image) It lights up just fine sound works but I just cant see anything - screen is a black block and adjusting the contract button has
no affect. Where have I gone wrong?

Thoughts / Advice desperately required!!