External monitor suddenly not working

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hcaceres

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Aug 5, 2020
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I have a laptop and an external monitor connected to it. I switched to single display for an hour and when I switched back to extended display, the monitor suddenly says no signal. I can see it is being detected in the Advanced Display settings so I'm not sure why it's not displaying. I've checked the cables, unplugged them and plugged them back in. I've also tried rebooting my laptop but none of those worked. Is there anything else I can check?
 

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Allan
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May 24, 2003
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In the advanced display settings is the resolution for the external monitor set correctly ?

For testing can you try a different monitor connected to the laptop and/or your monitor connected to a different computer ?

Please download and run this on the laptop then Copy & Paste the blue text it creates into you reply :-
https://static.techguy.org/download/tsginfo.exe

Also tell us the Monitor make and model please.
 
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