How to repair iPad 4 can't boot?
We received an iPad 4, the fault description is that after the iPad LCD screen is replaced, after the iPad owner repairs the iPad motherboard, the iPad cannot be turned on.
According to the description of the iPad user, we know that the iPad display has been replaced, and because the iPad does not turn off the power when the screen is replaced, it makes the iPad LCD screen half bright and half black. The iPad user then tried to fix it by repairing the iPad motherboard, but it failed and damaged the capacitor, so the iPad will no longer open.
First connect iPad to the DC power supply to check the current, we found the iPad is short circuit 3A.
Remove the iPad motherboard to observe, we found the inductor L2210 and L2200 and the one side of an inductor is connected by tin.
Clean it up, and then measure is again, now the iPad is not short circuit. Check iPad schematic diagram through by WUXINJI Dongle, we found these 2 inductors are backlight fuse inductor.
We can short connect these inductors by jumper wire, after short connection, install the iPad and test it.
Now the iPad displays normally, after entering the IOS system, all functions tested are normal, the repairs end!
Is the above method effective for you? If you have other effective measures to solve this problem, please contact us on www.vipfixphone.com.
According to the description of the iPad user, we know that the iPad display has been replaced, and because the iPad does not turn off the power when the screen is replaced, it makes the iPad LCD screen half bright and half black. The iPad user then tried to fix it by repairing the iPad motherboard, but it failed and damaged the capacitor, so the iPad will no longer open.
First connect iPad to the DC power supply to check the current, we found the iPad is short circuit 3A.
Remove the iPad motherboard to observe, we found the inductor L2210 and L2200 and the one side of an inductor is connected by tin.
Clean it up, and then measure is again, now the iPad is not short circuit. Check iPad schematic diagram through by WUXINJI Dongle, we found these 2 inductors are backlight fuse inductor.
We can short connect these inductors by jumper wire, after short connection, install the iPad and test it.
Now the iPad displays normally, after entering the IOS system, all functions tested are normal, the repairs end!
Is the above method effective for you? If you have other effective measures to solve this problem, please contact us on www.vipfixphone.com.
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