Others have relatively quick auto-shut-off functions that turn them off between the time you turn them on and the time that you get your laptop computer in place, connected and ready to check. Many projectors require you to hold the "Power" button down for a little while to turn them on. Steps to change the default display adapter vary by device, so contact the manufacturer for more information.When your laptop's display isn't being projected, the first things to check are the most basic ones. For example, on some systems, you can right click your desktop and select the software associated with your additional display adapter. If your system has more than one display adapter, also called a graphics card, you can try switching your system’s default display adapter. Typical ports are HDMI, VGA, DVI, and DisplayPort. If your system has more than one video output port, try plugging your external monitor into one of the other video output ports. If those didn’t work, here are more possibilities: This can help to isolate whether the issue is with the monitor or the primary system Try using the external monitor with a different system. If the new one works, you know the previous cable was faulty. Try changing the cable connecting the external monitor. Make sure the cable connecting your PC to your external monitor is secure. Connected docks, dongles, adapters and other hardware can cause conflicts. If you’re not seeing what you expect on the external monitor, start with basic hardware troubleshooting:ĭisconnect all accessories from your PC.
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