Yet another simasimac SE/30 giving me grief

[mattsoft]

F1 has no continuity, so the ADB is not getting any juice! I presume it's ok to jump F1 for testing purposes until I can get a replacement component?

 

[mattsoft]

Last post on this thread: the SE/30 is all fixed! Bad fuse on F1 was keeping the ADB from working. I jumped it and everything now works. New poly fuses ordered to replace jumpers. Another SE/30 saved!

 

[chiptripper]

Appreciate the clues in this thread, helped a lot.

I have a clean SE/30 board that showed simasimac on boot for up to a minute. It cleared up eventually but there were lingering graphical glitches. It also wouldn’t boot at all with a purple 2MB ROM.

Really threw me for a loop. Tried everything, even replaced the ROM socket (probably needed to be done anyway.)

It was the SWIM! Swapped it out and now everything works perfectly.

 

[roymaya]

Appreciate the clues in this thread, helped a lot.

I have a clean SE/30 board that showed simasimac on boot for up to a minute. It cleared up eventually but there were lingering graphical glitches. It also wouldn’t boot at all with a purple 2MB ROM.

Really threw me for a loop. Tried everything, even replaced the ROM socket (probably needed to be done anyway.)

It was the SWIM! Swapped it out and now everything works perfectly.

Glad you got it working. I have a similar SE/30 with simasimac also. I've checked the simm sockets, tried different Simms, checked for broken traces even bought a PDS rom thinking it might be a bad rom socket but still no luck. Might gut keeps telling it's also bad IC, probably the SWIM likes yours.