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Additional update: I tried heating up the chip and surrounding solder to fully rule out a bad joint; after doing so, heat no longer fixes the video output, so safe to say the VRAM (or half of it) is cooked (pun intended).

Quick addendum: I have attached a video of the mac in action. I have noticed that in the columns of the video, there seems to be a duplicate cursor, if I move the cursor around, as if the those two memory addresses are getting the same information.

I tried reflowing the pins on UC6. There seemed to be very little solder there, so I added a bit more. Did not seem to make much of a difference if at all. I'll go back and recheck continuity on the chip. For now, I have ordered a new NEC uPD41264C-12 to replace the TI chip that is currently in...

I haven't tried reflowing the solder around UC6 yet. I'll try that when I get back from work today.

Sorry, should have done this in the first place. Please excuse any liquid or grease that you see on the board, it is either deoxit or flux which I haven't cleaned yet. Also, please excuse the bodge job around C9, that pad tore off completely.

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...