PineTab2 freezes on login

[RobMac]

Just received my PineTab2 and am having some difficulty getting logged in. It boots up to the login screen OK.  In the lower-left it is defaulted to "Desktop Session: Plasma (Wayland)". When I entered the correct password for user "alarm", the screen locked up. I waited a few minutes, but nothing, so I hard power-cycled it. If I enter the incorrect password it does its little head shake thing and says Login Failed, but the correct password always results in locking up. So I tried switching it to "Desktop Session: Plasma (X11)". A little more success this time. I get the black & white chevron and three circles logo. The first time I tried X11 I then got the little KDE info wizard.  Step through that OK, but when I hit [Finish] the screen goes black and unresponsive.  Subsequent attempts to login it skips the info wizard and goes straight to blackscreen.

Is there anything I can try short of reflashing the image? This is my first Pine product and I am a little nervous about doing something wrong and bricking it. Particularly since this is a product I am not yet at all familiar with. Is that even a possibility that doing something wrong when reflashing could result in some sort of unrecoverable failure?

Thanks