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So, here's what seemed to work. Original ROM with 4 16MB SIMMS in Bank A, and 4 2MB SIMMS in Bank B. Got the beautiful bong when it turned on. I'm returning the ROMinator II and will seek out the Mode32 extension.

Okay, with the original ROM and 4MB of the original RAM in Bank A, I'm getting a BONG and no stripes. Now to switch the original ROM with the ROMinator to see if that works.

I plan to put back the original RAM and ROM and see if that works. A recap is definitely something I plan to do (parts ordered) as well. Thanks @techknight - yeah, I'm finding out that could be the case here but I have to rule out all possibilities first. 

Based on the board, do you think that the caps need to be replaced? 

Thanks! I did read that earlier when I was troubleshooting. I'll give the rubber band method a try.

The OWC 16MB RAM seems to be taller than the stock 1MB RAM modules, which is causing a slight clearance issue when placing the logic board inside the chassis. Is this something you encountered with your 16MB modules?

Good to know @ttb. Thanks!  I'll give the RAM swap a try. Here's hoping.

I'll give that a try. Most concerning to me is that with no RAM in any of the slots (only the ROM), the Mac displays the same zebra stripe pattern.

I haven't cleaned it. When I received the Mac a few months ago, and inspected the board - it looked clean. I'm not sure what the blob between C9 and C10 is - I used a toothbrush and some IPA on it and it seemed to diminish (not totally gone though). Putting the original ROM after testing the...

Today I received all the parts for my SE/30 upgrade, namely a ROMinator II and 4 16MB SIMMS from OWC. The problem: after installing the RAM and the ROMinator, I get horizontal stripes. I have made sure that all items are properly snapped in place. Now... I remove the ROMinator and put the...

great save!

Just came upon this thread. Thank you all for your valuable input and advice.  I have 64MB of RAM on order from OWC, along with a ROMinator II that's on my desk waiting to be installed. I'll report back once everything's installed.

Congratulations! Glad you were able to get your Mac SE/30 fully operational!

Another vote for seeing the restoration progress. Great score! 

JDW does some of the most thorough reviews on compact Macs that I've come across on Youtube. I really enjoy his videos and come away with learning many new things. Were it not for his PSU and analog board recapping videos (which I have watched multiple times), I would not have had the confidence...

Did you replace the capacitors on the logic board? And what about the CMOS battery? That needs to get replaced too...

This is really cool! I love the idea of a new logic board for our vintage machines. Sorry about the Maxell bomb on the SE. That's probably the most scary damage I've seen it cause. (And this is coming from someone who bought a Mac SE/30 with a Maxell bomb "surprise").

I'm looking forward to the updates. That board cleaned up really well! The IIci case is one of my favorite Mac form factors.

Glad to "meet" you all! Thanks for the heads-up on AFPBridge @superjer2000 - I'll look into it! 

Thanks everyone! I plan to install the system software on the 2nd SCSI2SD partition to see if I can get that partition to boot properly.