What is the white pattern on the mobile phone chip?

In the process of daily use of mobile phones, it is very common for mobile phones to get wet by water. For example, when washing your hands, you accidentally spill water droplets on your mobile phone, or use your mobile phone in rainy days, and the rain makes your mobile phone wet. In most cases, the phone can't be turned on, the display of the phone is abnormal, and the call is noisy. Moreover, some water intake machines have seriously corroded the circuit board, which makes the mobile phone impossible to repair for life. Therefore, when the mobile phone enters the water, whether it falls into clean water or dirty water, the battery of the mobile phone should be taken out and the mobile phone should not be recharged. If you continue to charge the mobile phone, the internal components of the mobile phone will be short-circuited and burned out. This will further expand the fault and increase the difficulty of maintenance, so don't charge or disassemble the battery after the phone is flooded.

Then you have to check whether the mobile phone falls into clean water or dirty water. If you fall into clean water, as long as you stop the work of the mobile phone immediately, it will generally not expand the fault. After removing the battery from the mobile phone that fell into clean water, clean the mobile phone with anhydrous alcohol. Because alcohol volatilizes quickly, the water on the circuit board can also be volatilized and taken away. Then use a hot air gun and a hair dryer to blow dry the circuit board, and then you can charge it and test it. Most mobile phones will work normally.

If the mobile phone falls into the sewage, first take the machine apart and see the corrosion degree of the mobile phone circuit board. Because there are many acid-base compounds in sewage, it will cause different degrees of corrosion to mobile phones. Therefore, after the mobile phone falls into the sewage, it should be cleaned up quickly. When processing, clean the visible corrosion first. Brush off the impurities attached to the pins of the components with a brush. Then, clean the circuit board with alcohol cotton balls. If the corrosion is serious, it must be cleaned with an ultrasonic cleaner, because the residue at the bottom of each component is not easy to clean, and the impurities can only be shaken out by ultrasonic molecular vibration before cleaning. Blow dry the circuit board with an air gun, and then repair weld all chips. Trial operation after welding, if it still does not start, or there are other faults, it is necessary to check whether there are burnt components and short circuits in the line according to the maintenance steps, in which the power module is relatively bad. After replacing the power module, most mobile phones that don't start the water machine will troubleshoot and return to normal work.