How do I troubleshoot display port

I've an HP monitor that I connect to my MacBook Pro using an Apple adaptor. Never had a problem until I recently diconnected by laptop.
Now the monitor no longer detects a signal from the laptop on display mode.  I've rebooted both the laptop and monitor and disconnected/reconnected the cables.  Still no juice.  I don't know if it's a problem with the adaptor or the port.  How do I troubleshoot the port?
Thanks,
Marcia

The font looks fine for your palette, you have just encountered some swatches from someone using a OS different than English. Just use the command to select unused colors adn delte, or change the names if they are used. If the colros keep coming back look into a post deleted global colors, as that incremental numbering naming convention looks similar to that.

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