Under the playfield next to each flipper is a fuse. If the fuse is good then check Q16 transistor right flipper. I'm assuming the wires ohm through. Look at Q16 on the board and compare the color of it to the transistors next to it. You may have to use a flashlight. You should see some discoloring on the top edge of it. Mine was bad and it's been good for 3 years now.