Why did my MacBook Pro M4 screen go black and then recover after reboot?
All has been well for the 4 months I've owned this MacBook Pro with M4 Pro chip (48 MB RAM) running Sequoia 15.4.1. (in the backrouound NordVPN and Norton Security are running) Today the screen went black. I tried increasing the brightness, closing and reopening the lid and waiting. The batter was full as confirmed by green light on power cable. Then I did a hard reboot (held down the power key for about 15 seconds) and now yhr keyboard beeped but no screen. So I plugged in an external monitor and it worked... but as safari was on the laptop screen I couldn't see it to get here, so I closed the laptop... and then the external monitor went black/off and no amount of tapping the external trackpad revived it. So I reopened the laptop and BINGO everything works just fine, external and internal monitors, keyboards, trackpads, everything.
So fingers crossed that whatever the glitch was its fixed itself ... however that is bit unnerving so my questions are 1) has anyone else had a similar experience and 2) what should I do if it happens again (I have a TimeMachine and iDrive backups)
[Re-Titled by Moderator]
MacBook Pro (M4)