I meant that the external display working doesn't give instant proof that it's hardware or software issue, problem still very open
it could be hardware : Screen cable not well made, some screen components not aligned or something ...
or software : driver or firmware can't manage the internal screen well, because it's new technology which has speaker and touch integrated into same software management, may have something weird going on there...
If you ask me, Microsoft is just too lazy to put our issue into their main table and solve it, hence the long time since a firmware update appeared.
Here is why I think it's a firmware issue:
I bought the device used, with very dated software, running perfectly fine -
I updated software to the latest windows 10 and drivers (used a driver updater too) and issues started happening in just 1 week
touch screen started ghost clicking and sometimes doesn't recognize touch in part of the screen, then after an other update that was fixed but the blur and shaking started, It started very lightly but with more updates along the way, the whole screen became
shaky, and you don't even have to be in windows, it's blurry in UEFI/ BIOS, and shakes from the beginning, you don't have to use it for hours or anything like that...
....
....
....Microsoft, are you there?