SE/30 refusing to startup
I recently retrieved my beloved old SE/30 from 12 years in (safe) storage. Was working fine when I packed it away and is in great condition - except it won't boot.
Symptoms: Bright, well-adjusted raster and moving cursor; no startup tone, no disk icon, goes no further in boot process. If I insert a disk, nothing happens. Doesn't seem to get far enough to respond to keyboard commands either, so I'm really stuck. 40MB HDD spins up, as does the external (whopping!) 1GB SCSI drive. Tried internal 40MB HDD thru external SCSI port = no go. (Only difference was the cursor wouldn't move.)
With _no_ HDD attached and nothing in floppy drive, I get same symptoms (above).
"Programmers switch" does't help; one blanks the screen for an instant and returns it to same state, the other produces 000000F over 0000013 (which only means "don't do that again" near as I can tell).
I found leaking caps and replaced all caps on logic board (incl. C11, the 220mfd to nowhere), new battery, got all drives working, cleaned/reseated all chips/connectors. All that = no change.
I have Larry Pina's Dead Mac Scrolls, all 8 pages of the SE/30's schematics, and a growing list of 20+ SE/30 web sites. Hoping the gurus here might have a suggestion or offer the clue I can't seem to find anywhere else. Feels like losing an old friend…..
Are the Bourns RC network chips (marked 115-0002 C 558 8943B) at RP2, RP3, RP10 critical to startup as some suggest? Are they the next suspects?
Thanks,
Mike