Well I'm stumped on this one. My Jurassic Park has been running fine for a year but it has given up the ghost temporarily. Upon start up, I'm blowing the F5 fuse on the bottom left board (the PPB board below the power supply). I have no flipper power and the ball will not shoot when I pull the trigger. I've checked the coils on the flippers and everything is moving free and the diodes on the flippers seem to be testing good. Game boots up just fine and kicks the ball into the shooter lane to start a game...just no 50v power for the trigger coil to shoot the ball into the playfield and no flipper power. Only F5 is blown...all other fuses checked out fine on the boards. Send advice my way or come fix it for beer if you are a local!

Thanks for the link on this! Got some reading to do

Wanted to post a resolution here. I ended up ordering a working used Data East PPB board off of eBay (got it cheap) and it resolved my issue. I haven't gone through all the transistors but I'm assuming one of the Tip36 transistors was bad. No coil diodes or anything else on the playfield were blown. Totally isolated to PPB board