For a Surface Pro 3 that is stuck on the Surface screen and won’t turn on, holding down the + Volume button and the Power button for 15 seconds may fix the problem for you. There are other ways you can try and fix a Surface Pro stuck on Surface Logo screen that won’t start up. For example, holding down the power button for 30 seconds and then powering back on has worked for me when failed updates have caused the Surface Pro to get stuck on Surface logo screen in the past. This time around, that did not work. A quick Google search brought me to this comment section where others were experiencing the same problem with the Surface Pro stuck on Surface Logo screen http://forums.windowscentral.com/microsoft-surface-pro-3/328628-rebooted-then-stuck-surface-logo.html
What ended up working for me was a two button shutdown. Turn it on – when you get stuck with just the Surface logo, press and hold the Volume Up + the Power button for at least 15 seconds. My screen shut off almost instantly – however, it vibrated about 10 seconds later. Then wait 30 seconds and press the Power button to start it back up.