Hello all, getting a bit frustrated with my old Mac se/30. Its got the typical vertical line issue. Ive applied every fix possible I can find online outside of washing the board with soap and water...

Ive replaced the chips at UE8, UD8. and UB11, UB12. Ive got through the surface traces 100 times over, having tested them all without the chips to be sure continuity was all there. The entire board is recapped and all those traces check out too.

I dont know what else to do at this point. The only recommended fix I havent tried is replacing a Bourns 4120R-601-250/201 chip.

Thanks for any help.