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Do have a voltmeter? It might be worth checking the terminator voltage with the SCSI plugged in.

What computer is being used? In particular, the Mac Plus does not supply terminator power by default (you can enable it by adding a diode).

Just a guess: 1N915 diode (?) This is from a keyboard matrix, right? Probably isn't all that critical what you use so long as the forward voltage drop is similar.

If both flybacks appear to be operating correctly my advice would be to leave them be. The Console5 kits come with all caps required, RIFA and otherwise. Note that most of the board caps are gobbed together and/or to the board with hot-melt glue. If it can be peeled away safely, do so...

Can't comment on the flyback (I don't see anything concerning in the photo, though). Definitely replace the RIFA caps ASAP. If your soldering skills are good recap the entire analog board.

Interesting! That Dove board is very similar to mine, but there are some key differences. I've posted photos of mine in a different topic here and will link to it if I can find it. I think this link will work: https://tinkerdifferent.com/threads/remove-and-socket-se-30-cpu.4153/post-35720

I'd definitely vote for the 45-degree sockets.

Can you post photos of that Dove accelerator? I recently removed and socketed the 030 chip in one of my SE/30s in order to install a Dove 030 accelerator. Works just fine, but I'm curious if yours has any bodge wires or other obvious differences. FYI: The 512ke daughterboard is carrying 1.5...

Heh - I left the machine on overnight running RAM tests and the jailbars returned. I see a chip replacement in my crystal ball...

yw! Glad it helped!

I hate intermittent problems... Took the machine apart and ran the motherboard on the bench using extension cables. The problem appeared initially. While it was showing the jailbars I poked, prodded, knocked, bent the pcb slightly and used freeze spray in the area of UE8. No effect on the...

Thanks for the reply! You are correct about the thread title, so I've changed it to something more reasonable. As soon as I have a clear bench again I'll take a close look at UE8.

In an earlier thread I mentioned having replaced the 68030 on my SE/30 with a socket and installing an accelerator. Afterwards I ran it for a week on the bench with no problems. Closed up the case, ran it for another day or two. No problem. Today, this: The machine is 100% operational aside...

Regardless of the claims made about the metal clip style ROM socket, I would take a very close look. One of my SE/30 machines kept crashing with a CayMac ROM SIMM installed (metal clip socket). After studying it for a bit I realized that, metal or not, the clip was not pressing the SIMM...

Sorry, forget this one:

Sure, here 'tis.

Please don't take this the wrong way, but if your bench skills are limited it's much healthier (in the physical sense) to not poke around in the display electronics. Beside the second anode lead from the flyback to the tube, there are high voltages on the analog PCB.

It could mean just about anything (motherboard, cabling, something on the analog board), but first step is to find out if heater voltage in the SE/30 is tapped off the flyback. I took a quick glance at the available diagrams and it's really not clear how the heater is powered.

Thanks very much for bringing clarity to the situation! The really weird part is that I have no recollection of ever owning an Old World PPC mac. At least I know what platforms are required to check them out in realtime.

The Sonnet G3 was in my long-defunct Motorola Starmax system. From memory, that was not a NuBus machine. The others all have the same card-edge connector, so I think if one fits in a motherboard then they all will. I do know that the Power Computing cards were intended as direct replacements...