Mac display on external monitor switching off

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Joined
30 May 2021
Posts
33
Location
Epsom
Hi All,
I have an M3 MBA and 2 PC's connected to an external monitor. I use the mac laptop with the lid closed. If I am using the mac and then switch the display to one of the PC's.
When I switch back to the mac the display output appears to have switched off, or the mac has gone to sleep.

The only way to fix it is to partially open the lid on the MBA and then close it which brings the mac back to life.
Is there a setting in the mac system settings that could fix this?

Many thanks.
 
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