Double Image on screen

[Arvis]

My Pinephone with Convergence package arrived yesterday

I powered it on and the first couple of set up screens worked fine then the screen started flickering with a second fainter image appearing about 1cm above the main image on the screen. (eg the time is shown twice, with the fainter ghost image  above flickering up and down)

I managed to run the updates, and I charged the battery, and I have rebooted several times but it is still  the same

Has anyone met this problem or have any suggestions as to what is happening?

Thanks