Smoke coming from k4600 chassis

[KLOV]

I bought a k4600 untested. I recapped everything, reflowed double checked everything powered up and nothing. After about 5 seconds I saw some smoke and when looking even felt heat. After looking over everything, this piece (attached) seems to have very much overheated. Is it possible this is just bad or would something else cause this? I did check through diodes etc and common problem tests to check everything before I started it.

Source: https://forums.arcade-museum.com/thread ... is.532416/