05-22-2020, 09:55 AM
I looked into your Mac model. I can see that it has a SMT version of the 85C30. 
That makes replacing it a nightmare. However, I did read that this motherboard does odd things (like no serial or AppleTalk) when there are bad caps. Do you have AppleTalk setup? That would be another way to verify the SCC is working or not.
Here is some info on the re-capping your Mac:
https://scruss.com/blog/2016/12/11/mac-c...e-capping/
That makes replacing it a nightmare. However, I did read that this motherboard does odd things (like no serial or AppleTalk) when there are bad caps. Do you have AppleTalk setup? That would be another way to verify the SCC is working or not.Here is some info on the re-capping your Mac:
https://scruss.com/blog/2016/12/11/mac-c...e-capping/