Thank you to the most recent people to help me. I would be more than willing to learn, except when I try to do just about anything like de-soldering and soldering things it winds up killing the computer in question. I did find out from another thread that there are these "tritanium" or some such capacitors which can be bad but not have the telltale symptoms. I appreciate that I have gotten different opinions as I indeed believed the yoke connector was and still is the most likely thing, but if my capacitors are indeed that tritanium stuff the original responder could be right. God helped me find a miracle man who has offered to at least look at it and see if it is within his range of repair capabilities; which he is well experienced with CRTs of various kinds and how power and related things like horizontal deflection get to them when they are malfunctioning.

I am curious to know what else could go wrong and how to buy myself as much time as possible (I am with any luck going to get the 128k diagnosed to determine which of the two most likely issues is actually the issue, or if they're both bad [i sure hope not...]

I mean, I have it unplugged and turned off. Will that prolong the Mac 128k's time before it gets worse? Or should I have it plugged in? Thank you for your help! (I was helping my mother with an estate sale of my Grandmother's estate (she passed away in 2008 and we're about to lose the house if we don't pay the taxes, which we're trying to have the sale to get the money...)

Thank everyone for continuing to care and I have also to say that unless the individual memory chips have been replaced-that part I can't tell-the label on the logic board says it's an original 128k, just like the back case backs up, and it was supposedly made well after the 512k was introduced, being made the week of October 7th versus September 10th...)