Just because your displays are connected doesn’t mean that your computer recognizes them. Open your computers system control panel and display settings. Check to see if it recognizes all the external monitors. If the computer is not seeing the multiple monitors, try rebooting the computer while ...
Trouble Connecting 2017 Macbook Pro to DisplayPort External Monitor Hello all, Happy 4th. I have a new 2017 MBP, and an old Dell Dell P2210T monitor. The monitor has a DisplayPort port (and VGA & DVI), and I confirmed with Dell that a USB-C to DisplayPort cable (male on both ends...