Akash

If the phone was unable to charge the battery or some how the power switch might be short such problem shows while the power switch is short check it first.If the same 1- Check the battery or charge with external source. 2- Upgrade firmware

Before ordering the battery check the phones by external source by external power supply to found that the phone dead causes have only battery or other problems is.After long time not charging and connect with circuit battery amp is in sleep stage so you can also charge by any other outer charging live master charger and check if it start to works means you save your pocket i think.

Water damage makes massive damage on the phone but don`t ignore the home button that also makes such issues if it is short.

To find error on iPhone iTunes is the best,Apple says one thing in the article but the problem is different on the cases,But no dough the error shows by the iTunes is the best method to find the solution other 3rd party app is also good for other purpose.This may help you to solve the problem.

That fault related to Baseband chip,This problems seems to be error -1 on old IOS but after the update of the New IOS that fault was shown.That is hardware issues to fix it you have to knowledge on micro soldering or better to give cellphone repair export for fix.

No dough that is the cause of defective screen.The iPhone x and X-max series have a lot of issues and also sensetive. After screen replacement the unbalance fitting creates that problem or If in the case of copy LCD that the risk is highly.

By seeing that issues might be light circuit broken or shorting while you fixed the LCD.This problem accidentily occurs while we connect the LCD on the phone while in on condition or without disconnect the battery.You have to check the Light related parts.

Error 53 is the error of NFC chip.On the latest version of IOS this issues was solved by could not activate iPhone coz the activation data wrong shows means Error 53 gone but activation issues still remain.

Flash the phone with firmware.

By seeing the history of the faults that is related to Trister IC .You have to experience that issues below if that is related to the Trister. 1-Battery charging might be slow. 2-Battery not drain more while on operating but on standby mode it`s drain more. 3- sometime you encounter the heating on the back side.