Hello All. I got a non working Williams Firepower machine last week and started to remove the playfield parts for new rubber (after I ordered the Rottendog MPU327-4 MPU) and noticed this diode or whet ever you call this has seen better days. I've been looking on Pinside and noticed other machines had had issues with this part. It seems to have a lot of heat in this area. This is my first SS game so I am a little lost. How does someone find out the part number for all these diodes that I see at practically every solder joint? I want and need to learn about this subject but really cant find a place to do so.
Thank you for your input.