So I'm having issues with a repair. My upper right flipper when out on my Jurassic Park Machine. I check the coil and someone had installed one besides the one in the manual . So I installed a new one from stren that matched the factory one and nothing. So I did a full rebuild on the lower right. Now both are dead. I've checked all the fuses, The wiring diagrams, everything I know or have read to do. Both red light come on on the flipper board when the bottom is pressed. I need some advice on what to check or if I have messed up something. The right upper flipper was intermittent a few months ago then I had the issue where after 10mins of play the machine would freeze. I installed a new power supply and it fixed that problem but the upper never worked since.

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Which diodes are backwards? I bought them from macrospec that's just how they came I can switch them around if needs be. Yeah the first pic is the lower right that has the Eos, I didn't change it out. I did notice the F1 fuse blown on the flipper board as well. Thank you got the replies I'm new to pinball repair and realy want fit it.

Okay, so maybe the backwards diode was blowing my fuse. Is it okay to just swap the wires, or do I need to flip the diodes?

Okay so I checked the lower right with an ohm meter and it was only 0.2. I took it off and placed the old one back on. I also flipped the diode on the upper right coil, someone said it was backwards and it was from the old one and all the others. I replaced both fuses on the flipper board for those flippers. Powered up the machine went to service mode. The lower right instantly flipped once, then nothing. I checked both fuses were blown. Any ideas on where to look now?

Okay, I took off both coils and removed both diodes. The lower right was 0.2, so I took the old one which read 3.7. I installed them both with the band going to the blue yellow which looks to be the wire coming from the flipper board. The lower right flips once in the service menu then the F1 F5 fuses blow and it's dead again

The fuses only blow when the right flipper is hit. I went ahead and changed out the two diodes with new ones. I also installed a new flipper board. All of the flippers are working now. Thank you all for the help!

I have another problem now that was there before, it's an error 1 ball missing, the game tries to find it by shooting a ball but it barely makes it onto the playfield