no monitors after reboot safemode action

Greetings all!

I'm working with a missionary in Nepal to fix his computer -and this morning, after I sent the reboot safemode action, his computer has lost monitors.  The computer appears to turn on and off using the Power Button for reset, etc.  But no monitors display.  

Yes, the monitors are securely plugged into the desktop and powered on.

The desktop is running Windows 10.