SE/30 - Bad ASC?

[macgeek417]

I have a recently-acquired SE/30 here... Wouldn't boot, no surprise. C2 had spewed electrolyte all over the surrounding chips (especially UE10 and UD8). Cleaned that up the best I could, replaced UD8 (pin 1 had disintegrated) and recapped the board. Got the interesting symptoms shown in the attached pictures, which I traced back to A0 at UD4 (pin 4) having a broken trace somewhere.

In the process of tracking that down, I also noticed that A0 was broken right next to the pad on UE10 (the ASC chip). With a bodge wire installed to fix A0 on UD8, the video problem is resolved, but if I fix the broken trace on UE10, the system no longer boots at all. Any thoughts on anywhere else I should look, or is this likely just UE10 being dead?

I also attached a picture of that region of the board before any bodge wires were installed.

Thanks!

 

[Zitruskeks]

Which track you think was broken that, when fixing it prevents the system to boot? can you mark it in the pic?

Also clean your board, theres tons of electrolyte left to corrode it further. Putting it in a plastic container and fubmerging it in isopropanol can really help. I also used a spare ultrasonic toothbrush to agitate the remnants when the board was submerged.