I have recently have been given a Mac SE/30 by a friend. I have recapped the Logic Board and the Analog board and ultrasonically cleaned the boards. However, the computer will only power on sometimes. If it boots at all, there is no sound from the front speaker. If I use headphone port sound is present, continuity tests indicate that the jack is working correctly when a headset is not inserted.
I have another SE/30 and have swapped the logic board. The chassis/system boots every time with a known good logic board, and the sound works properly. So I believe the analog board is working properly, and the problem is with the logic board. I have also tested the 5v and 12v output on the floppy connector and received good readings.
I am a novice in regards to vintage Macs but have much experience in electronics repair in general.
With the conditions described, does anyone have any suggestions for likely suspects?
I have another SE/30 and have swapped the logic board. The chassis/system boots every time with a known good logic board, and the sound works properly. So I believe the analog board is working properly, and the problem is with the logic board. I have also tested the 5v and 12v output on the floppy connector and received good readings.
I am a novice in regards to vintage Macs but have much experience in electronics repair in general.
With the conditions described, does anyone have any suggestions for likely suspects?