Alignment problem

My VB is getting really messed up. It’s so bad now, I can barely play it. The left screen is raised up, and you can barely see anything. less than half of the bottom part is visible. I tried the alignment check (with Mario’s tennis in) but the line in the left screen was completely gone.A week ago it happened, but they went away quickly. they’re here permanently now, though, and I have the courage to open the VB up and fix it now, but I can’t because of the weird screws and I don’t have aything that could take out part of a screwdriver or a way to get the right kind of screwdriver to get the deep screws.
I’m stuck.