I have absolutely no idea if this can be fixed or not but I think
I have found my problem. As suspected by me and many of you I believe I have some logic board damage. I have included a picture of the logic board in my 5S next to another fully functioning 5S logic board. After removing the black sticker that goes around the connectors there is a visible difference between the two. The one having the touch issue looks a greenish rainbow color. Note that the board has not sustained any water damage. After removing the screens bracket and tinkering with that a bit when the board stops responding to touch I can tap the board near the touch ic controller and it will immediately start working again Until it stops working. I have not noticed a pattern per say at all and even if I try I can't get the touch to turn off again once it's back on other than waiting for it to stop so I can't figure out what causes it to stop. Anyway this is probably very confusing for most of you and I am not expecting a fix, but I am kind of wondering what could have caused this damage pictured? I am positive it is somewhat related.
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