SE30 Boots on Floppy Only

OldeGuysSE30

New Tinkerer
Nov 8, 2026
1
0
1
Pulled out of 10+ years storage: 1st startup ran ~5-min then froze & displayed "no disk" icon. Opened up & found no battery issues; but some green @capacitors + on legs of several chips. Cleaned all & recapped w/Tantalums + installed new PRAM batt. Board has been soaked in IPA. RAM & ROM chip pads are clean & shiny. Now starts, chimes, & runs on floppy only; no image icon for hard drive. Does not recognize ZIP-drive. Traces on board + solder joints look good.
I'm experienced at soldering & tracing connections, but this is my first time at board-level diagnostics and would truly appreciate suggestions that might help get this bit of history running again!
 

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jmacz

Tinkerer
Mar 21, 2025
99
113
33
That’s a lot of capacitor gunk everywhere. I would test continuity and resistance on all the pins on the scsi chip ui12 to wherever they go, like uj11 and uk11. And also against the internal scsi connector.