Just a tip for changing screens. You don't have to remove the battery (and thus lose the stored waveform) when changing screens. If you disconnect only the screen ribbon cable, and remove all black screws and only the silver screws around the perimeter (no need to remove battery, 3G module of the inner screws for the powered hinge contact), then you can lift out the motherboard and midboard together to change the screen. I just did it in less than 15 minutes, and the replacement screen (A Sony touch screen!) works and looks fine. No need to switch screens for a restart to store the waveform.
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