mjhagen
Active member
Hi all,
I have three SE/30s, one works flawlessly (Mac A), one boots into the OS but has sound has issues (Mac B, I have another topic about this one), but my issue is with the latest one (Mac C):
When I got it, I did a superficial check and turned it on and it booted (without chime) into the :?: screen. It looked pretty corroded (and no sound) so I decided on a cleaning and recap.
After the recap was done, I got a nice clean chime, but now it no longer booted to the :?: screen (see video.)
During the recap I noticed the corrosion had eaten away the trace next to the negative lead of C2 which I patched by running a wire from pin 5 on UB10 to pin 50 on UI8.
The other thing I did to it was remove, clean and re-solder UC8.
I mentioned the other SE/30s because I thought I'd try to debug this issue by measuring (in diode mode) IC values against the other Macs. The weird thing is that both machines that boot into the OS have different values on the IC I re-soldered (UC8), pin 11 has OL on Mac B, but 1.100 V on Mac A, so I don't really know where to go from here.
Has anyone got any idea what a gray screen is about? Or any other hints?
I've included a couple pics of the board.
Thanks!
I have three SE/30s, one works flawlessly (Mac A), one boots into the OS but has sound has issues (Mac B, I have another topic about this one), but my issue is with the latest one (Mac C):
When I got it, I did a superficial check and turned it on and it booted (without chime) into the :?: screen. It looked pretty corroded (and no sound) so I decided on a cleaning and recap.
After the recap was done, I got a nice clean chime, but now it no longer booted to the :?: screen (see video.)
During the recap I noticed the corrosion had eaten away the trace next to the negative lead of C2 which I patched by running a wire from pin 5 on UB10 to pin 50 on UI8.
The other thing I did to it was remove, clean and re-solder UC8.
I mentioned the other SE/30s because I thought I'd try to debug this issue by measuring (in diode mode) IC values against the other Macs. The weird thing is that both machines that boot into the OS have different values on the IC I re-soldered (UC8), pin 11 has OL on Mac B, but 1.100 V on Mac A, so I don't really know where to go from here.
Has anyone got any idea what a gray screen is about? Or any other hints?
I've included a couple pics of the board.
Thanks!