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.

User profile for user: BeavertonGuy
BeavertonGuy Author
User level: Level 1
4 points

Mac Mini and LG monitor worked perfectly before being relocated. Now the Mac and LG are no longer communicating. Connection is with HDMI. HDMI cable is in good shape. Monitor indicates NO SIGNAL PLEASE CHECK CONNECTION, Tried OC PR.

Unable to reconnect Mac mini to LG monitor. Earlier connection was successful. LG monitor is powered when plugged in , but screen indicate NO SIGNAL. Tried powering Mac mini using option/command P+R without success. All cables are in excellent shape.

Mac mini, macOS 13.0

Posted on Dec 12, 2022 8:46 PM

Reply
Question marked as Top-ranking reply
User profile for user: VikingOSX
VikingOSX
Community+ 2024
User level: Level 10
116,579 points

Posted on Dec 13, 2022 4:23 AM

Consider revisiting the LG on-screen controls to verify that you have plugged the HDMI cable into the correct active HDMI port on that display. My 32-inch LG 4K Ultrafine display has two HDMI ports and their selection is controlled by those on-screen controls. Wrong port, blank screen. I am using a 1-meter Belkin HDMI 2.1 4K HDR high-speed cable between my M1 mini and the LG display and have no display issues.

View in context
3 replies
Question marked as Top-ranking reply
User profile for user: VikingOSX
VikingOSX
Community+ 2024
User level: Level 10
116,579 points

Dec 13, 2022 4:23 AM in response to BeavertonGuy

Consider revisiting the LG on-screen controls to verify that you have plugged the HDMI cable into the correct active HDMI port on that display. My 32-inch LG 4K Ultrafine display has two HDMI ports and their selection is controlled by those on-screen controls. Wrong port, blank screen. I am using a 1-meter Belkin HDMI 2.1 4K HDR high-speed cable between my M1 mini and the LG display and have no display issues.

Reply

Mac Mini and LG monitor worked perfectly before being relocated. Now the Mac and LG are no longer communicating. Connection is with HDMI. HDMI cable is in good shape. Monitor indicates NO SIGNAL PLEASE CHECK CONNECTION, Tried OC PR.

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