The screen going black doesn't correspond with a time when you made a change to the layout that's being used as the defaults on your client does it? If you change the layout that's currently running, it will be considered invalid for playback and the client will drop back to the Splash Screen - or any other valid layout. How the system is intended to be used is that you have a default layout that never changes - that could be either your company logo or the logo of the establishment the screen is installed in. You then use the Scheduler to schedule on your additional content. When you then make a change to any of the scheduled content, if the layout finishes playing before the new media items can be downloaded, the client will display the default layout until the media finishes downloading.
I suspect what's happening is you're adding media or changing media in the timeline on the layout that you've got set as the default while it's playing and that's what's causing your problems.
I keep getting the error below. I have tried different settings both in wp-config and the defaults constants but I keep getting this error. It is really frustrating and starting to make me ill. Mostly the error seems to pertain to wp-db.php but not always. It is quite random seeming actually. It will be fine for usually about 20 minutes then the site and phpmyadmin will be all ERROR 500.
Nov 13, 2012 - After you install Microsoft Dynamics SL 2011 and SQL Server 2008 on the. (SQL Server Native Client 10.0, C: Windows SysWOW64 sqlncli10.dll). It was installed with the Administrator login, but can't fall on a sword for it.
Seems to be ok again for a bit when I reset Xampp but then occurs again several times a day. I am at my wits end! Code: 
VirtualAlloc() failed: [0x00000008] Not enough storage is available to process this command. VirtualAlloc() failed: [0x00000008] Not enough storage is available to process this command. [Wed Oct 05 17:00 2016] [:error] [pid 5048:tid 916] [client 173.245.55.204:26688] PHP Fatal error: Out of memory (allocated 2097152) (tried to allocate 32768 bytes) in C: xampp htdocs mywbsite wordpress wp-includes wp-db.php on line 2875 Posts: 5 Joined: 12.
August 2016 23:57 XAMPP version: newest Operating System: win10.