Disconnect the adapter again and power off the monitor. If its still not working, connect the cable again and power off the display. If that still doesnt work, try restarting your Mac in safe mode and then reset the display resolution to defaults. Another option is to reset the Macs NVRAM and SMC.
Why is my Mac not working with HDMI?
If your Mac doesnt recognize your HDTV, display, or other HDMI device after making the connection: Turn off the HDMI device while your Mac is turned on. Unplug the HDMI cable from your Mac, then plug it in again. Turn on the HDMI device.
How do I force my MacBook to use an external monitor?
3 AnswersHook the LCD display to the Mac with the appropriate adapter.Hook up the external keyboard and mouse (optional but recommended)Boot the MacBook with the broken screen, then close the screen during boot.
What to do if monitor is not displaying?
Check the PowerUnplug the monitor from the wall.Unplug the cord from the back of the monitor.Wait one minute.Plug the monitor cord back into the Monitor and a known-good wall outlet.Press the Monitor power button.If this still does not work, try with known-good power cord.21 Feb 2021
How do I fix no display monitor?
Try these fixes:Check if your monitor is turned on.Reconnect your monitor to your computer.Disconnect your peripherals.Reinstall your RAM.Reset your BIOS settings to default.Bonus tip: Update your device drivers.13 Jan 2021
Why is my monitor on but no display?
If your computer starts but displays nothing, you should check is if your monitor is working properly. Check the power light of your monitor to verify that its turned on. If your monitor wont turn on, unplug the power adapter of your monitor, and then plug it back into the power outlet.
Why am I getting no signal on my monitor?
A no signal error on a monitor could be a sign that your PC monitor is ignoring the graphics output from your PC. If this is the case, make sure that the input source on your monitor is correctly set. If it isnt, switch to the correct source (for example, HDMI or DVI for modern PCs) to get your monitor working again.
Why isnt my computer displaying on my monitor?
Check Your Connections In particular, ensure your monitor is plugged into the wall and receiving power, and double-check that the cable going to your PC is firmly plugged in at both ends. If you have a graphics card, your monitor should be plugged into that, not the HDMI port on your motherboard.
What do I need to connect my MacBook Pro to a monitor?
If you are using a 2015 or older MacBook Pro, you can connect an HDMI cable from your computer directly to a monitor. If you own a new MacBook Pro with USB C or a 12-inch MacBook you will need a USB C to HDMI or USB C to DisplayPort adapter. The MacBook Air requires a mini DisplayPort to HDMI adapter.
How do I fix a monitor that wont display?
[Tech Article] How to fix when your monitor wont displayMake sure you only have one video cable plugged into your monitor.Make sure your monitor is plugged into the right port on the back of your PC.Power Cycle/Clear Caps on your computer.Check the monitor input setting.Test another monitor or cable.11 Aug 2020