nitinthepic
Member
I was in the middle of fixing up a Mac SE/30 when I noticed the image began looking glitchy (was trying to get MODE32 working since the Rominator II is out of stock right now; So I had two BlueSCSIs plugged in along with a floppy emu).
Like so:

I have recapped the system, and have checked the continuity of each cap, so I believe that is on the up and up. I removed the ROM to force the Mac to push black and white horizontal bars to the CRT; that looked correct, so I believe that the analog board is okay as well. Aside from the visual oddities, the system works basically fine. I traced out all the multiplexer chips and UE8 and I couldn't find any broken traces. Finally, I decided to use my hot air station to heat up all the chips to see if it would temporary improve things. I found that if I heated up UC6 that the image went back to normal which was great. However, over time, the image would degrade back to the glitchy state. Below is a picture of it working after heating up UC6.

I should mention that the board had very little in the way of corrosion and that I have given it multiple IPA baths, plus a fair amount of deoxit.
At this point, I was wondering what my steps forward should be. I have also checked all the SO/VID pins on UC6 against UE8.
Like so:

I have recapped the system, and have checked the continuity of each cap, so I believe that is on the up and up. I removed the ROM to force the Mac to push black and white horizontal bars to the CRT; that looked correct, so I believe that the analog board is okay as well. Aside from the visual oddities, the system works basically fine. I traced out all the multiplexer chips and UE8 and I couldn't find any broken traces. Finally, I decided to use my hot air station to heat up all the chips to see if it would temporary improve things. I found that if I heated up UC6 that the image went back to normal which was great. However, over time, the image would degrade back to the glitchy state. Below is a picture of it working after heating up UC6.

I should mention that the board had very little in the way of corrosion and that I have given it multiple IPA baths, plus a fair amount of deoxit.
At this point, I was wondering what my steps forward should be. I have also checked all the SO/VID pins on UC6 against UE8.