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E7450 external monitor is blank


I got dell E7450 

In the morning I put the laptop in the docking station and turn it on from hibernate.

The external screen  prompts me with  the HD lock pin after I punch it in the monitor goes blank

To get the external monitor back to wrok I need to open the laptop lid and close it again

Does anyone know why this is happaning?



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Community Manager
Community Manager

RE: E7450 external monitor is blank

Hi noamkeren,

Thanks for posting.

Hibernation issues have always been problematic and doesn't matter which brand of computer, which is why I don't recommend using it.  

It sounds like the wake up instructions and sleep configuration have been corrupted.  If you haven't checked to see if you have the latest BIOS, you can try that.  If that's okay, then take the computer off the dock, shut it down completely, remove the battery, and hold the power button in for a few seconds, then replace the battery and restart.  Also disconnect the power from the dock and drain any residual power the same way.  Post back with your results.

Dell-Robert P
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