You appear to be confirming what I had guessed before. Namely, that you did NOT have this screen focus problem when you first had your SE/30 operational, prior to any motherboard recapping jobs. Hence, I still feel confident that something was bumped or broken, either on the analog board and/or yoke which is causing your focusing problems. And yes, I too agree that a photo of your screen would be useful in this case to see the precise type of focusing problem you have.

But again, I have never had this kind of problem occur, neither before nor after a recap job. And keep in mind I have used electrolytic caps as well as tantalum caps on my logic board. The simply fact is that the logic board is also called the "digital board." Focusing is analog. If your digital motherboard is fried, you might not get any picture at all, or you might get some kind of oddball pixels, but you won't get an out of focus image due to a problem on the motherboard. Your troubleshooting "focus" needs to be on the analog parts in your SE/30.