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Punkyclown's picture
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Joined: 2017 Nov 9
How to turn off laptop screen when connected to Monitor

Hi All,

I have connected my Powerbook 1400c to an Apple 15" Multisync AV Monitor. Runs well,
but I can't close the laptop without turning off the Monitor also. Is there some setting I can
user to do that? Much appreciated.
Brad Hansen

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adespoton's picture
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Joined: 2015 Feb 15

Which Mac OS are you running?

Punkyclown's picture
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Joined: 2017 Nov 9

Hi, 8.6, Thanks!

OpenSourceMac's picture
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Joined: 2019 Jan 21

On most of them without Clamshell Mode, you usually have to just turn the brightness all the way down. Is that an option on yours? Even the ones where you close the unit to turn-off the screen, it's not always a great idea (overheating and such).