What about step 3???

Please dont hurry , take your Time to follow this procedure. It takes 20 min (not 5) and step 4 requires half of this Time. Good luck.

Yes messy, but this Is one of the best Ultrabook available, no regret!!

Right, only 3 Big ones, but another smaller must also be removed.

I opened they display, very carefull. No problem. Open just enough to press they button.

Very difficult step, Proceed very carefull