Chosen Solution
Hi, I have a liquid damaged Iphone 7. I replaced one of the LCD connectors since some pins was burned . The liquid seemed to be on the lcd flex, and connectors, and not all over the motherboard. Therefore i have not preformed any ultrasonic cleaning yet. There is no picture on the LCD and backlight is dead, but the phone vibrates when i touch the home button. I have tried to ghost type the lock code, but the touch screen seemed unresponsive (no vibration after failed attempts). Does someone have any experience where to begin fault finding, or known components that fails after similar damages ? Thanks
If the device was water damaged the board should have been ultrasonic’d no matter what. Having the device on could be causing severe damage. Even if you cant see water doesn’t mean it hasn’t gone deep into the logicboard At this stage i would take the board out, ultrasonic. Use new components to test. Battery, screen, chargeport. Upside is that the home button might still work i guess..
Yes, the entire backlight, image, and home button/fingerprint sensor circuits. These are commonly fried when iPhone 7 hits water at the bottom of the phone. It sounds, incredulously, like you have attempted to change the lcd connector without even taking the board out of the housing. If you do, then the damage will be obvious at the very bottom of the board on the back side.
If you have taken the board out and this area looks clean, then the most likely problem becomes your lcd connector job—you have bad joints.
