Schritt 5 übersetzen
Remove all screws close to the edge of the metal support bracket in logical order. Store the screws in the same order on adhesive tape to make re-assembly easier.
Unplug the two flat cables of the screen from the PCB-connectors. The cable close to the power connector you just need to lift up. To release the second cable from the connector you need to flip up the white backside (unlock) of this connector and slide the cable out.
The touch screen unit is difficult to separate into pieces i.e. to replace the top glass (touch/digitizer unit) only. If you are not familiar with advanced opening techniques you should stop here and may order a new entire touch screen unit. In this case please do not perform my next steps.