Thanks to Ian Primus, who pointed me to
http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html. I removed,
contacts with "control cleaner" and reseated all the SIMMs (ROM and RAM).
Half of the RAM looked like an upgrade (they have 9 rather then 8 chips
and said AZen Memory Upgrade on them). So I only put in the other half,
but put them into the wrong bank. I was rewarded by a rising, cheary
tune but it wouldn't get past the zebra screen. Ooops. Pull it apart
again, notice that I'd put RAM into wrong bank. But *all* the RAM back.
Get the happy-mac-BONG. Now it boots up into system 7.5.5 perfectly.
Woot woot!
Now I go hunt for an SE PDS ethernet card. (Anyone have a spare?)
-Philip