@erse double check your complete work. From what you said the prior battery had expanded so yes, that could be an issue that will require a new screen. the only other thing I wonder about is how you handle the water damage. Double check your connector for bend pins on both the board and the cable connector. After that, I recommend you get a new display and change yours. If nothing else it will give you a known-well starting point for further troubleshooting.
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