After a poor repair attempt, the issue often becomes more complicated: stripped screws, glue residue, missing parts and new faults appear.
Liquid damage does not always kill a device immediately. The real symptoms may appear hours, days or even weeks later.
A similar crack does not always mean the same repair. Sometimes one step is enough, and sometimes a full module swap is safer.
Fast drain, overheating and random shutdowns are often direct signs of battery wear rather than just device age.
The most common mistake is charging the device or trying to dry it quickly with a hair dryer. That often makes the damage worse.
The same complaint can hide very different failures, from a simple module issue to board-level damage. That is why a serious service center does not quote blindly.