Within the last few days (first discovered yesterday, was fine the week before, and computer not used daily) two of my monitors a show black screen even though the power is on. If I turn the monitor off and on it displayes for about 2-3 seconds and goes black. I DID get one (the left) to work properly one time after a re-boot. The are both an Optiquest VS12107 using VGA and are on different graphics cards. The monitor driver is the generic driver for Windows 10. Nothing has changed in the hardware depart, and I see nothing but an update to Adobe in the last week. The monitors are reported as detected and moving my mouse to either one acts as if the mouse is moving there (even though the mouse can't be seen). The set-up as follows: Left - Optiquest VS12107, VGA, GTX770 graphics card. - This screen is black. Center - Dell ST2421L, HDMI, GTX770 graphics card. Right - Optiquest VS12107, VGA, ATI Radeon HD 5400 Series graphics card. - This screen is black Since different graphics cards are involved I've focused on the monitors themselves, and therefore their drivers. Here is what I have tried so far: - I did a check for updates on the driver and was told it was up to date. - Although it's always worked fine using the Generic PnP driver looked for a driver specifically for the Optiquest monitor and found none. - I left the machine off for a time and then booted up (in case there was some heat issue). Still no luck. - A attached another VGA monitor to the left and it worked fine. - I did some web searches and tried a few things there (can't remember exactly what) and still no joy. The one thing I've not had a chance to try yet is to put one of the monitors on a different computer. I'll try that this evening. So there you have it. If anyone has any ideas I'd certainly appreciate it. Thanks.