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Screen corruption after recap se/30
Posted by: lowlytech on 2020-03-22 18:35:59
Well i Schruted it.  I surprising had a buggy but working se/30, recapped the logic board since it was still original caps and now i get no chime and a solid screen of corruption.  I got all the old caps off with no issues with pads, and suprising the leaks looked nonexistent to minimal, but it is the first time for me to use

polymer tants instead of electrolytics.  All caps seem soldered down good and polarity is correct. Does this look like a ud8/ue8 issue or should i focus elsewhere.

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Posted by: Bolle on 2020-03-22 22:20:02
Broken or shorted CPU data bus line somewhere.

Let‘s see a few closeups from around the see caps. This sometimes happens around the three caps next to the power connector. The traces running through under them are data bus signals.

It could also be a badly seated ROM/RAM SIMM.
Posted by: lowlytech on 2020-03-24 05:46:40
Thanks Bolle for the suggestions.  Sorry i haven't got to take a second to do more than take a few pics of the board.  I will pull the 3 by the power connector and reattach and also inspect for solder overflow.  Looks like i may have gotten a little overzealous in the solder on some of these..   also previously tried a known good rom simm and reseated it several times ensuring the contacts were clean.

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Posted by: lowlytech on 2020-03-25 05:38:24
Well i am officially giving up for now on this board.  Was trying to have a nice clean board as my one other se30 has like 9 wires all over the motherboard for trace repairs.  Don't know what i did, this is my first time to experience making it worse after a recap in probably 50 recap projects.  I pulled all caps off, put on electrolytic radials, no change.  Ended up lifting two pads after trying to be so careful as well.  I would be more motivated to fix it if i didn't already have the one repaired se/30 logic board.  
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