How to fix iPad mini2 without backlight and no display on screen?
The customer sent an iPad Mini2, which can be turned on normally. The only drawback is that there is no backlight and no display on the screen. What should I do if there is no display on the iPad Mini2 screen? What are the causes and solutions? I will analyze it with you below.
Open the iPad Mini 2 to observe, we can see that the lower half of the motherboard is water damaged. Check the motherboard under the magnifying glass carefully. The power supply and the display interface are corroded badly.
First we deal with the power part, and then carefully deal with the display interface, because this iPad is the display and backlight problem, when finished processing, one of the resistors fell down, check the schematic diagram on WUXINJI dongle, we found it's the light IO data interface, this resistance is 1 ohm.
After shorting the jumper, measure the ground resistance at the display interface with a Fluke Digital Multimeter. Four locations were found where the resistance of the pin has no resistance value.
Short connect one by one, it has display but no backlight, so we concentrate on the high voltage side at this time, we found that the backlight positive pole and the interface are corrosive under the microscope, so we slowly scrape with a knife, and then weld with 0.01mm Jumper Wire, to prevent loose weld when install the display screen.
Install to test, the problem is solved now.
If you have other unclear points, please send feedback or leave a message on www.vipfixphone.com.
Open the iPad Mini 2 to observe, we can see that the lower half of the motherboard is water damaged. Check the motherboard under the magnifying glass carefully. The power supply and the display interface are corroded badly.
First we deal with the power part, and then carefully deal with the display interface, because this iPad is the display and backlight problem, when finished processing, one of the resistors fell down, check the schematic diagram on WUXINJI dongle, we found it's the light IO data interface, this resistance is 1 ohm.
After shorting the jumper, measure the ground resistance at the display interface with a Fluke Digital Multimeter. Four locations were found where the resistance of the pin has no resistance value.
Short connect one by one, it has display but no backlight, so we concentrate on the high voltage side at this time, we found that the backlight positive pole and the interface are corrosive under the microscope, so we slowly scrape with a knife, and then weld with 0.01mm Jumper Wire, to prevent loose weld when install the display screen.
Install to test, the problem is solved now.
If you have other unclear points, please send feedback or leave a message on www.vipfixphone.com.
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