This is my first pin. I had to do major work on the boards to make it stable. I did put in the flash/ram chip to eliminate the batteries and recapped the sound board. Read the DE service bulletins. I put inline fuses for the coils that can stick open. This happened to me and roasted about 10 output transistors. I know this is my opinion but I spent about $200 on LED's with the premium faceted 3500k white LED's and color matched high quality ones for the colored inserts and it had a unbelievable change. It made it look 20 years newer. Power consumption went down with LED's and it seemed to help the power supply and less heat/hot spots. I also have a pinscore I believe power supply and not the original as well as replacing the display.