Windows 10: Task bar moves from Main Display to laptop screen after restarting the laptop

Hi,I have two external monitors connected through a docking station. I have selected one of my monitors as my main display. At the end of the day, I shut down my laptop and unplug it from the docking station. The next day, I turn it back on and plug it again on the docking station. The main task bar moves to my laptop screen but the external monitor is still selected as my main display. Is there a way to avoid the task bar moving to the laptop screen every time?Thanks in advance.

:)

 

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Remove the screen for space purpose here its small desk and if the screen is opened it will hide my 22 inches lcd

 

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Confusing statement! You want to change the display on your laptop that died?

Is that correct?

How do you know its the display that's bad?

Just google "how to change display on a acer 5745"

Should get you to step by step instructions. But first make sure its the display that's bad