aapl2c
Member
Hello!
I obtained a Macintosh SE/30 that was mostly working - it'd sometimes take a few tries to boot (completely corrupt screen or no video) and then when it would boot, no sound. So I replaced all the caps on the motherboard and gave it a good manual (careful) cleaning with isopropyl alcohol.
I re-installed the motherboard it now boots reliably, sound is working, and has good voltages. However it has horizontal corruption as you can see in the attached photos. The system works ok otherwise.
It looks as if there's horizontal white bars drawn across the screen pushing the correct video up in that space. The mouse cursor does not redraw correctly as it's moved about on the screen, but menus drop down/disappear ok.
So far I've tried:
- different RAM
- re-seating all socketed chips and ROM SIMM
- making sure sockets are clean, including a blast of DeoxIT
I see from another thread where similar issues were found, though the corruption looked different, vertical in nature, and in some cases apparently the system did not work otherwise.
Before I go down the road from that thread, checking trace/via continuity, does this seem like anything else anyone has seen?
Thanks!
Photos attached showing the issue at boot, in the OS showing the About this Macintosh screen, the shutdown dialog, and a photo of the re-capped motherboard.
I obtained a Macintosh SE/30 that was mostly working - it'd sometimes take a few tries to boot (completely corrupt screen or no video) and then when it would boot, no sound. So I replaced all the caps on the motherboard and gave it a good manual (careful) cleaning with isopropyl alcohol.
I re-installed the motherboard it now boots reliably, sound is working, and has good voltages. However it has horizontal corruption as you can see in the attached photos. The system works ok otherwise.
It looks as if there's horizontal white bars drawn across the screen pushing the correct video up in that space. The mouse cursor does not redraw correctly as it's moved about on the screen, but menus drop down/disappear ok.
So far I've tried:
- different RAM
- re-seating all socketed chips and ROM SIMM
- making sure sockets are clean, including a blast of DeoxIT
I see from another thread where similar issues were found, though the corruption looked different, vertical in nature, and in some cases apparently the system did not work otherwise.
Before I go down the road from that thread, checking trace/via continuity, does this seem like anything else anyone has seen?
Thanks!
Photos attached showing the issue at boot, in the OS showing the About this Macintosh screen, the shutdown dialog, and a photo of the re-capped motherboard.