Hello, ok have this model in for repair, the issue is that main screen keeps blanking out!
On boot you will see bit of bios boot then it goes black, it will appear for a moment when windows login appears.
pressing FN F10 can get it to show for a moment sometimes
Attaching an external monitor works and can work from external ok, the main screen remains blank but will appear briefly if you do something like start task manager, or require admin conformation.
Before seeing it i thought possible faulty screen inverter but not sure now?