How to check iPhone 5SE home button fault

According to the past experience, we do have some summarize for it.  iPhone 5SE fingerprint faults is not a specific problem, but for now, it may be a little strange.

Anyway, there forever likes its beautiful size, we don't refuse it, let us start today's fix process.

1. The iPhone SE fingerprint can't be opened smoothly

Disassemble the iPhone SE by phone opening tools, and then remove the iPhone SE logic board.

Use multimeter to measure the iPhone SE to check whether there are the 1.9V (PP1V9_MESA) and 3.1V (PP3V1_MESA), you can test it by pressing the iPhone power button.

If the 1.9V (PP1V9_MESA) and 3.1V (PP3V1_MESA) doesn't exist, then you can fix it by short connect FL4100 and FL4105.

If both the 1.9V and 3.1V are exist, then use Fluke 15B+ Digital Multi-meter to measure the diode data, if the data is infinitely large, check the corresponding circuit, and short connect FL4110, R4111, FL4112, FL4114 and R4116.

If the voltage or diode data is abnormal at the beginning, after repairing, the data back to normal, but the iPhone fingerprint still can't be opened, you can fix it by flashing iPhone or erase all data on iPhone SE.

2. If the iPhone SE fingerprint can be opened smoothly, but the iPhone home button is not responding when adding a new fingerprint.

Measure the diode data for this pin  to check if it has the diode data.

If it has no diode data, then use QUICK 861DW to short connect FL1407.

If it has the diode data, then use Precision Titanium Alloy Tweezers to replace the new U4040, because the damaged fingerprint power supply U4040 can cause iPhone SE adding fingerprint failed.

After you finished the aboved operation, check it again. If it still can't work,  we may advise you our latest phone fingerprint repair tool, it will be a useful way for home button faults.