When your iPhone 6s home button is not working or comes unresponsive, we have some possible fixes to share with you. Before the fix, we can check the calibration defect, the dust and moisture in the crevice. Then it still can' t work, you had to consider the hardware repair methods. Now VIPFIX has a set of fix solution for you, hoping you benifit from it.
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The Fault: The iPhone 6S home button is unresponsive, when I press it, long time no response. There is one or two times a day will turn into recovery mode. Repaired the CPU and WiFi, 32.768, 24M, NAND were also replaced before, the fault is still existing. The description is shown in picture 1-1.
Step 1. Test the iPhone 6s motherboard with multimeter, boot current and power flow is normal, so charge on the side. An hour later, we find that home button has no response by pressing several times. The iPhone device could be lighted by pressing the screen-lock button, but home buttion is responsive after screen is locked, so the fault was judged as wake-up delay.
Step 2. Measure BURRON_MENU_KEY_CONN_L, the home button voltage is about 1.3V as normal valure, considering the peer has changed the iPhone WiFi, clock, CPU, so the fault is locked in the fingerprint button scale. The original picture is shown in picture 1-2.
Step 3. According to observe on the picture, we get to know the board is without print, we doubt the iPhone 6S CPU has been doing the real-time test to whole device hardwares after booting, this motherboard has no original fingerprint key. Fingerprint key does not match, so it's suspicious that the CPU has been repeatedly verify if the fingerprint key is matched, which leads to wake-up delay, standby sleep phenomenon.
Step 4. Next, we're going to disconnect the fingerprint so that it doesn't work. As shown in picture 1-3. After disconnection, the phenomenon of delayed wake-up disappears. We test again before shipping it back to customer, it cannot be turned on now, measure the current with 70 Ma, connect it to the computer, which displays recovery mode, but does not display the model. As shown in picture 1-4.
Step 5. It cannot identify the model, we find the resistance on phone bitmap and measure whether the pull-up voltage is normal, the result is only 1.65V. As shown in picture 1-5.
Step 6. Remove a 240 ohm resistor from the scrap motherboard to change the pull up voltage. As shown in picture 1-6.
Step 7. After the 240 ohm resistor is switched on, the iPhone 6S main board is perfectly repaired. As shown in picture 1-7.
More information about phone repair guides and tools, you can ask help for Vip Fix Shop Team.