I tested all imaginable functionality on the new OLED screen. Taptics are fine. Then, I noticed that the battery wasn't charging. Any ideas as to what could have gone wrong?

All the steps went swimmingly, until I got to this step. As soon as I put in the Phillips 00 screw driver, I immediately knew that one of the Phillips screws was already partly stripped - probably during original assembly. Sure enough, no engagement. Does anyone know how to remove such a tiny stripped screw?