I searched for "black screen" issues in the forum, but no one ever mentioned having the problem when switching user accounts on Surface. I have this problem a lot, my son frequently logs into his account on my Surface and just stays logged in after he puts the machine in sleep mode. When I try to switch to my account, Surface wakes up to login screen fine, but often goes to black screen and becomes completely unresponsive right after I put my PIN in or when using "Hello", immediately after Surface recognizes me. It's not off, because I can hear the fan running. At that point I tried attaching and detaching the keyboard multiple times with keyboard attached, tried pressing Ctrl Alt Del, or any other key combination tapping on screen moving and clicking on mouse None of the above ever helps, so the only thing left is hard reset (10-second power button to turn off and back on). - all updates successfully installed - black screen only happens when switching active user accounts, never when only one user is logged in Any tips to fix this? Does anyone have any similar problem when switching between user accounts? Many thanks!