Mine had been working fine. But now the stand ups 1,2,3 on the lower playfield are not responding. They share MPU inputs with the green upper deck 1,2,3 switches. I played with the glass off, and when the lower playfield is active and I hit the upper 1,2,3 switches, I get credit as if I hit the lower ones. So, it seems that the MPU connection is fine. Everything else seems to work with regard to the lower playfield. All of the lights (including 1,2,3) and other switches work. Any ideas?