I had my SE/30 up and running (with TS adapter and Daystar Turbo 040) for about 15 minutes today when I head a little "beep" sound from the analog board (I think) and then the machine froze. I rebooted and it started to load off the hard drive when I heard that little sound again and the machine froze. Whenever I heard the sound, I also saw a very very quick hiccup on the screen, like a little vertical spike toward the middle of the screen. It only flashed on for something like 10ms to my eye, so it could hardly been seen, but I spotted it at the same time I heard the beep sound.
Anyway, after turning the machine on and off a few times and seeing it would only freeze, I opened the machine, disconnected the internal hard drive and Turbo 040 and TS adapter and powered on. This time I got the "chimes of death" and saw some unusual artifacts on the screen as shown in my attached photo.
I then pulled the motherboard and couldn't see anything wrong with it. This has been a known good and working SE/30 board for me for some time now. I had replaced all the capacitors (mostly with tantalums) to ensure good operation. For good measure I pulled out the RAM SIMMs and the ROM SIMM and replaced them. Upon booting I still got the artifacts. I get the artifacts even when I have the floppy drive disconnected. I then pulled the motherboard again and put a different ROM SIMM in (I had a IIsi ROM in there, but I put back in the stock SE/30 ROM). Still get the artifacts. I tried different RAM. Still get the artifacts (and chimes of death).
I next pulled another good working SE/30 motherboard (which I also re-capped) and had served me well a long time. It had a different ROM SIMM and RAM from my other motherboard. When I connected it and switched on power, there was no chime at all and I saw horizontal stripes (SimasiMac). I pulled the board an reseated the ROM and RAM. Still no sound and horizontal stripes. I then pulled the board and tried different RAM (never before used) and yet another ROM (I have several). Still get no sound and horizontal stripes.
I then yanked my Sony PSU, analog board and the little board that attached to the back of the CRT yoke. I replaced that with a working set (also with known good Sony PSU). I put the first motherboard. Still get the same artifacts and chimes of death. I then put in my second motherboard. Still get no sound and horizontal stripes.
I finally checked the voltage at the external floppy connector. With my first board (chimes of death and artifacts) I get 5.01v and 12.7v measurements. With my SimasiMac board, I get 4.90v and 12.6v.
Having tried everything I can think of, I am at a complete loss as to what to do next. I would therefore appreciate any help you kind souls could provide to get me back up and running again.