1 - 3 horas
Screen went black when screen was at open 80 degrees or greater.
Very straight forward and easy when you take your time and follow along the step-by-step directions.
Good quality screwdrivers make a difference when dissassembling and reassembling. I used zip-lock snack bags and a black marker to label each bag as "STEP __" to identify and store all screws in each step of the process.