Unfortunately, after updating macOS15.4. 1, the monitor often blacks and has no signal

by Poster May 6, 2025 1
The black screen is a monitor connected with a type-c to dp cable, and the other one plugged into HDMI is fine. When the screen is black, the monitor shows no signal input. BetterDisplay also shows a black screen monitor. On another monitor, the monitor that operates to modify brightness and other settings also responds but does not restore the picture. The monitor can resume the connection by changing settings such as color mode, refresh rate and color description file, and it will black from time to time, which is really annoying.

Replies

  • Poster May 14, 2025
    It's actually the problem with the monitor, Dell S2721QS, this method is really useful https://www.reddit.com/r/Dell/comments/c2qb8a/no_dp_input_signal/? tl = zh-hans https://i.imgur.com/xvjVeBl.png