"Strange battery issue after replacing the battery"に関する回答Could be a faulty battery as well. But in terms of the Tristar chip there are lots of places out there that can repair or replace the chip just have to look around it’s a pretty common thing.
"Touchscreen disease - accessing data from laptop?"に関する回答Are you positive you have an issue with your touch ic chip? Because it says your have a 6s+. And touch disease is extremely rare on the 6s series. In terms of accessing data the only way of doing it would require hooking it up a computer you have already trusted or authorized on both phone and computer in iTunes.
"Phone restarts while not fully starting up"に関する回答Hi first thing I would do is test the battery if you can. Sometimes certain failing batteries will result in a process call bootlooping which is what your experiencing. other possible cause could be a corrupted software of some sort.