I have an iPhone XR which I got in faulty condition with a cracked display and faulty battery, When I initially got it, I tried plugging kit in to see what would happen but it showed no visible signs of life and instead got quite warm - I assumed this was due to the faulty battery so proceeded with the repair (Was told the phone would take close to 24 hours to fully charge)
I replaced the screen and battery without any issues and it initially started up just fine, although it kept on restarting over and over again which I blamed on the new battery not being calibrated. As the phone was draining quite quickly, I decided to plug it in to charge, although to my surprise would not charge and still got very warm.
Trying a cheap wireless charge did not change anything. All replacement parts were of high quality from a reputable source.
When I was initially working on this phone, when connecting the wireless charger or plugging in the charger, the phone would show the battery flat logo and battery flat logo + charger logo when no charging method is connected.
Fast forward a few months and I am going trough my pile of phones still under repair and I thought I would give it another shot although now nothing comes up at all even when left to charge for a while.
Does anyone have any theories on what's wrong? Personally, I suspect the Hydra IC. board level micro soldering is not something I have the tools for or much experience in, but would like to get into it at some point.