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I did this unfortunately without any effect.

I found SE schematics at https://archive.org/download/Macintosh68kSchematics but they are barely readable. Are there any better ones somewhere? Arent all adress lines used when only half the capacity is set? Also the second line changes every time I power the machine up. This leads me to believe...

Hello there, I'm new to the classic Mac world and bought me an SE FDHD recently. Unfortunately this was battery bombed and probably beyond repair. I got me a replacement motherboard which once was an original Apple repair part. The board does look ununsed. I installed 4 identical 1MB SIMM...