Working SE/30 with really strange video
- Thread starter d3jsp
- Start date
this looks to me like one of the video memory dram isn't getting anything written to it somehow.
i wonder what it would look like if you swapped the 41264s around...
also wait a minute are those the original capacitors?? if they are you gotta remove them, clean up the areas around the old caps, and install new ones...
i wonder what it would look like if you swapped the 41264s around...
also wait a minute are those the original capacitors?? if they are you gotta remove them, clean up the areas around the old caps, and install new ones...
I would recap it first before trying anything else. Those caps look ripe. Whenever I recap, I check the surrounding traces and vias and repair as needed.
As others mentioned, the first step is removing and replacing all the SMD caps. Everyone has their own approach to cleaning up the corrosion. I usually dab the area with white vinegar (both sides of the board if the crud appears on the bottom) and let it bubble away to neutralize any remaining alkaline residue. Wash with distilled water afterward and let the board dry for at least 24 hours. Then take a Q-Tip and 95% IPA and see how much scaling you can remove with light scrubbing. If any of the chip legs have been eaten it can be very hard to see. I don't think any of the logic chips in the row with UE8 are particularly hard to find. Best bet is to remove UE8, clean thoroughly underneath and solder in a new one.
