For others who run into this problem. I replaced the screen and it seemed to go well, however the home button was non functioning afterwards. I found this thread and kept looking at the original home button flex which seemed normal, I could see a little black dot. So just in case I ordered a new home button flex cable. Then after I had them side by side I could see that what I had originally seen was the remnants of the black dot, and it was wearing off! I found a YouTube video about how to replace the black dot. Whew!!!
I hope this helps someone else who needs to see exactly what it is!
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