Chosen Solution
After a screen repair, the phone displays a message stating it has paused charging due to high temperatures. However, the phone is not hot at all. I have replaced both the battery and chargeport but the issue continues to happen when plugged into a charger and when placed on a wireless charging pad. I know the Samsung S8 displayed this message if the phone was not fully assembled so I made sure to fully assemble the device before attempting to test all its functions. Any other part I may need to replace and check or any other recommendations?
The Antenna Coil, which is on the rear assembly (the plastic pieces that are screwed in) needs to be intact and make contact with the board to work. If it is not making contact or is damaged, the temperature sensor will not work which will not allow the phone to charge. -Samsung Tech
If this isn’t the issue then your board has probably been fried by a faulty PMIC chip on the motherboard - an issue which is VERY common on 8th gen Samsung devices, but some S9s can be affected. Only solution at that point is to just replace the motherboard, because other options will most likely be more expensive… unless you want to hunt down all the IC chips that could have failed at this point. Also make sure the contact points on the board are intact. I’ve seen cases where techs have knocked those off (I don’t know how).
I sometimes have lag problems, but that’s only when I visit the “Apps” section in settings. Do you have any of those crap cleaning apps like clean master etc. All will slow your phone and causes overheating as will any anti virus apps both are not needed so deleting them will help. As will cleaning the cache from the settings monthly, factory reseting the phone annually and not using it when it is charging. If you want more info: - https://ifixmobiletoronto.ca/
