You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

The external monitor, which is connected to my MacBook Pro, is blank and the power button is flickering. How can I fix this please?

The Mitsubishi external monitor, which is connected to my MacBook Pro, is blank and the power button is flickering. How can I fix this please?



MacBook Pro 15″, macOS 12.4

Posted on Sep 5, 2022 11:41 PM

Reply
Question marked as Top-ranking reply

Posted on Sep 6, 2022 12:45 AM

If your display is blank or not detected

Try these steps if you don't see an image on your display.

Check your cable or adapter

Disconnect the cable from your external display from your Mac, then reconnect it. If the cable from your external display doesn't connect to the ports on your Mac, you can use a USB-C or Thunderbolt adapter. If you're using a USB-C or Thunderbolt adapter to connect a display, the adapter must be compliant with DisplayPort Alt Mode or Thunderbolt / USB 4.

Check how many displays you can connect

If you're connecting multiple displays to your Mac, use the Tech Specs page to find out how many external displays your Mac supports.

  1. Choose Apple menu  > About This Mac, double-click your serial number, then press Command-C to copy it.
  2. Go to the Tech Specs page, click the Search Tech Specs bar, press Command-V to enter your computer's serial number, then click Search.
  3. Click the specs page for your Mac. The number of displays your Mac supports appears under Video Support or Graphics.


If your external display isn't detected or appears blurry when connected to your Mac - Apple Support


Similar questions

2 replies
Question marked as Top-ranking reply

Sep 6, 2022 12:45 AM in response to Thanksforyourhelp2

If your display is blank or not detected

Try these steps if you don't see an image on your display.

Check your cable or adapter

Disconnect the cable from your external display from your Mac, then reconnect it. If the cable from your external display doesn't connect to the ports on your Mac, you can use a USB-C or Thunderbolt adapter. If you're using a USB-C or Thunderbolt adapter to connect a display, the adapter must be compliant with DisplayPort Alt Mode or Thunderbolt / USB 4.

Check how many displays you can connect

If you're connecting multiple displays to your Mac, use the Tech Specs page to find out how many external displays your Mac supports.

  1. Choose Apple menu  > About This Mac, double-click your serial number, then press Command-C to copy it.
  2. Go to the Tech Specs page, click the Search Tech Specs bar, press Command-V to enter your computer's serial number, then click Search.
  3. Click the specs page for your Mac. The number of displays your Mac supports appears under Video Support or Graphics.


If your external display isn't detected or appears blurry when connected to your Mac - Apple Support


The external monitor, which is connected to my MacBook Pro, is blank and the power button is flickering. How can I fix this please?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.