When we say Hey Siri to the iPhone, Siri doesn't wake up. Go to Settings, Siri & Search, and we see that the "Listen for "Hey Siri" icon isn't turned on. Turn on this icon, go to set up "Hey Siri" interface, but it's failed to setup. Press the iPhone home button for Siri, it works properly. Therefore, we suspected that it's the iPhone front microphone problem.
Use phone opening tools to disassemble the iPhone, disconnect the iPhone battery, remove the iPhone display assembly, and then take out the iPhone motherboard.
Attach the iPhone motherboard on the PCB holder fixture, use DT-17N digital multimeter to measure the diode data for the iPhone front camera connector, the diode data for 29 Pin is 0L, it's abnormal, there is open-circuited on the relevant circuits of the 29 Pin.
Now we need to check iPhone audio IC. Apply some high resistance tape on the iPhone Nand flash next to the iPhone audio IC, and then use QUICK 861DW soldering station to remove the iPhone audio IC. Clean the solder pad, apply some solder paste to the solder pad, and then then install the new audio IC to the motherboard.
Now assemble the iPhone, press the power button to turn it on, the iPhone is turned on successfully. Go to Settings, Siri & Search, turn on "Listen for "Hey Siri" icon and go to set up interface, following the tips to set up "hey siri", "Hey Siri" is ready. The iPhone Hey Siri problem has been solved!
Have you ever had a problem with Siri not working? Do you have any other Siri troubleshooting tips? Share them with us in the comments!