Acer V15 Nitro Grey bar across screen issue

grimoire

Occasionally on boot or when waking up from sleep a vertical grey bar has been flashing up on my screen. Sometimes the bar has colored looking code on it other times it is just grey.

 

When plugged into my external monitor the bar still shows up but only on the laptop monitor.

 

Does anyone have any idea what this may be? I have read on other forums that it may be a loose connection on the display. If that is the case I will have send it back for repair but I really hope not to.

 

Any help is most appreciated!