Are you saying the screw is stripped? As in the screwdriver can’t get a grip on it? If that is the case, the best way to unscrew a stripped screw is to use a rubber-band. Put it over the screw and stab the screwdriver into it and it will grip it like a new screw.

Hi, sorry if redundant but are you restarting the laptop between each keyboard? PS2 isn’t hot-swappable.