A iPad AIR 2 was received, and the customer said he could use it yesterday, but today he suddenly failed to turn on the phone. How can we deal with this situation correctly? Let's have a look in this article!
First, we connect the iPad to the computer to see if it is in the mode. If we enter the mode, we can restore the machine.
After the connection, the computer was found in the recovery mode, but there was no serial number. It seems that the NAND flash chip was not recognized. Generally speaking, there are two kinds of faults: one is the NAND chip, the other is the circuit disconnecting CPU and NAND.
This is easier to deal with, remove the iPad Air2 NAND chip, nothing is abnormal when we use Fluke digital multimeter to measure the grounding resistance of the NAND pad, that we judge it may be the problem of the NAND chip. Remove the NAND chip off and put it on iPad NAND Test Fixture, it can't be read so we can judge that the NAND chip has problem . Replace the NAND chip and write a set of serial number code without ID on the test fixture, then weld the NAND chip back to the motherboard with QUICK 861DW Hot Air Station.
Reinstall the iPad to reflash, the NAND chip can finally be recognized now, also the progress bar works well!
The recovery process is passed normally, and all the functions are tested well, repair ends here.
Summary: This reboot failure is caused by the damage of the iPad Air2 NAND flash chip.
If you want to get more technical support about iPhone repair, please research on www.vipfixphone.com
First, we connect the iPad to the computer to see if it is in the mode. If we enter the mode, we can restore the machine.
After the connection, the computer was found in the recovery mode, but there was no serial number. It seems that the NAND flash chip was not recognized. Generally speaking, there are two kinds of faults: one is the NAND chip, the other is the circuit disconnecting CPU and NAND.
This is easier to deal with, remove the iPad Air2 NAND chip, nothing is abnormal when we use Fluke digital multimeter to measure the grounding resistance of the NAND pad, that we judge it may be the problem of the NAND chip. Remove the NAND chip off and put it on iPad NAND Test Fixture, it can't be read so we can judge that the NAND chip has problem . Replace the NAND chip and write a set of serial number code without ID on the test fixture, then weld the NAND chip back to the motherboard with QUICK 861DW Hot Air Station.
Reinstall the iPad to reflash, the NAND chip can finally be recognized now, also the progress bar works well!
The recovery process is passed normally, and all the functions are tested well, repair ends here.
Summary: This reboot failure is caused by the damage of the iPad Air2 NAND flash chip.
If you want to get more technical support about iPhone repair, please research on www.vipfixphone.com
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