My daughter dropped my Surface RT from a height of about two feet onto a wood floor. No visual marks visible. However, after she did that, the screen started acting up. It would go in and out, show distortion, and mostly not work. The only way to get a glimpse of the screen would be to press the sleep button: that would make the screen pop up for a tenth of a second or so. Bummer. Broken screen, loose connection, something like that. However, when I restarted it (hard reset), I noticed that the startup screen was fine, showing "Surface" and the spinning circle (of dots, that one). No screen issue there at all. That gave me a thought: I restarted into recovery mode (from USB) and tried a refresh: no go. Okay then, a full reset: throughout the reset, the screen worked fine. Perfectly responsive. I could answer the questions (what language &c) and it consistently showed itself while installing. Clearly, then, the screen itself is not broken and even the touch obviously works. No loose connection. Once fully reinstalled, it started up (again, showing its startup message perfectly). Once we get to the log-in, the old problem is back: the screen goes dark (but backlighting still on). Putting it to sleep makes the screen reappear for a bit, and then it's gone again. I then thought that maybe the drive was corrupted. So I did another full reset, this time with full format in hopes that it would discover bad sectors. Again, the whole process showed the screen anb touch actually work perfectly. Once done, same problem as before: once we reach log-in (or actually set-up), the screen goes dark. I'm baffled. What could be the cause? The screen clearly works, touch still clearly works, the processor clearly works, and yet the screen fails on the installed machine. Any thoughts?