So on my 1978 Lost World restoration, I noticed all my score displays were out. I am new to this so after reading up on this forum, I figured it was possibly my F1 fuse on my solenoid board that was bad. Sure enough, that fuse in the high voltage area was blown. Not knowing much about fuses, I installed a 250v 10A fuse instead of a 250v 3/16a fuse. So after 2 seconds I saw smoke so I unplugged and removed fuse. My question : I am not sure what was burning in which area. I just saw smoke. I am wondering if it would have affected the score display boards or somewhere else. Anybody know? And now when I start my machine the test light on the MPU board stays lighted and stuck on the 4th flash. Help if you can. Yup, I'm a dumba$$.