Some HV121P01 are IBM/Lenovo/Thinkpad parts. Comes with Wacom Digitizer and front shield. Remove the Wacom Digitizer first.

1. remove the 4 philips screws in red circles.

2. use some thin object, like a knife, to separate the 2 double sided tapes in red rectangles from the white plastic back.

The front shield can protect the screen during the following steps, remove it only after anything else are done!