The VUK/ball popper wasn't working on my T2. The test reported:
Check switch 31 Gun loaded
Check switch 76 Ball popper
Check switch 15 Trough left
Those switches are on different rows/columns. So I powered off and started looking under the playfield. I noticed a wire had come off of the knock down coil, so I resoldered it. When I powered up again, smoke started coming from the coil. Uh oh. I powered off after staring at the smoke coming up for a few seconds in horror.
So I'm obviously going to need a new coil. The coil has no diodes, so... maybe a bad transistor? Any ideas on a root cause though?
When I went to plug in my soldering iron and couldn't find a plug I also noticed this, shall we say interesting, hack job on the power as shown in the pictures. Just how worried should I be?