One original Game Boy powers on, but has lines going through the screen, very annoying.
The other did the same and I tried taking it apart in hopes to repair it, but only succeeded in making a mess.
One of the original Game Boys also has a sound issue. I seem to have lost the windows that go over the screen, but maybe they'll turn up.
The GBA SP AGS-101 works, but has a shattered screen. It slipped out of a package when I attempted to ship it to somebody. So now, all you can do is play the game without any visuals. No fun just hearing the music and Mario jumping.