One way to fix a Chromebook that wont turn on is to do a hard reset on your Chromebook. You can do this by 1. Turning off your Chromebook, 2. Press and hold refresh + tap power, 3. When your Chromebook starts, stop holding refresh. 

If your Chromebook is freezing or crashing, you may have a tab open in your browser that is causing that problem. One way to fix this is refreshing the page by pressing Ctrl + Shift + R.  Also,  if your Chromebook is not charging, make sure the outlet is working. 

If your Chromebook is too zoomed in or too zoomed out, try pressing Ctrl and + to zoom in and press Ctrl and – to zoom out 

If your Chromebook screen is turned upside down or turned to the side there is a very easy fix. By pressing  Ctrl + Shift + Refresh, it will rotate your screen to how you want it.