First of all:
Here are the updated schematics of the Raspboy:
I tried to get rid of the noise caused by the Amplifier with a self-made shield:
No, that´s not a condom…..
Another epic fail – the noise was´nt very impressed of the shield. So I installed the old Amplifier again – Better crappy sount than no sound – or noise on the LCD.
I almost closed the Raspboy-Casing by gluing the screw-mounting (which I cut off another GameBoy case) into the Raspboy. It worked perfectly.
Too bad this method worked only with 3 of the 6 screws, so there is a little gap on one of the corners of the RaspBoy case…