stachowiak
Member
I'm repairing an SE/30 logic board for a friend and have a problem with booting up with system 7. I don't have any history with this board, but it had some corrosion in the battery holder but was otherwise very clean. I have successfully recapped and repaired over 50 logic boards, and this board is the one of the cleanest I've ever encountered. I have a working SE/30 that I use for troubleshooting and am using this to test this board, so I know that the analog board, hard drive and floppy are good. I've also installed the good Ram and Rom Sim from my good board into the problem board, Booting from a system 7 hard drive hangs up just after the "Welcome To Macintosh" screen appears. If I boot from a system 7 floppy takes me to a blank finder screen with no text or icons. The system will boot from a system 6 floppy and will mount the system 7 hard drive. When I run my Snooper test program that's on the hard drive it fails the memory test with a "Buss Error" and locks up the machine. I've checked continuity from the ram sockets to the mux and bus connections and haven't found any open connections. I've also traced out all of the SCSI chip pins without finding anything. A Google search found a listing for a similar problem on this forum from April of 2017 but it doesn't seem to be here anymore. Any suggestions would be appreciated.