Hello! My Surface 3 is less than a week old. Yesterday, I got a mini-HDMI to VGA adapter and connected it to my TV to test it out. (I will be using my Surface with an LCD projector extensively at work). I turned on the TV and pressed the power button. The Surface started to boot, and then - nothing! By pressing the power button again, I got a half screen of my lock page to complete the shutdown. Several repetitions later, I gave up. Took it back to Staples, and the tech guy there was as puzzled as I was. We could connect to a monitor and see the same half lock screen, but it wouldn't boot. I had purchased the extra warranty, so was going to go home and contact them. We decided to get another opinion from a second tech guy. We pushed the power button, and it immediately started to boot. It now appears to be working fine. (I have turned it on and shut down several times.) I hate problems being "solved" without knowing the root cause. Any insights would be greatly appreciated.