オリジナル投稿者： Minho ,
Here’s the thing…you have a water damaged phone. Sometimes they are fully repairable but sometimes they suffer from latent issues because despite best efforts to clean the board, even using an ultrasonic bath for example, the water infiltrates the most sensitive IC’s. Some water damaged phones are just not repairable, or at least not economically viable. Your problem sounds like it comes from the CPU…which is bad news. The LCD driver circuit is basically just some voltages to drive the LCD. The image is formed by the CPU and the data is transmitted directly to the LCD. In addition, your CPU is getting hot. You can keep troubleshooting this phone, you’ll learn a lot and maybe even have fun ;>) but it will probably not be fixable.