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thermalmonitord watchdog · missing sensor
Missing sensor(s): mic1 — Bottom microphone (Mic1)
The phone restarts about every 3 minutes with userspace watchdog timeout: no successful checkins from thermalmonitord and Missing sensor(s): mic1.Multi-source
Where to look: Charge-port flex assembly (bottom mic) · Charge-port connector / data lines
Bench checks
- Swap-test a known-good OEM/premium charge-port flex.
Board detail by model
iPhone 11
Lines: I2C1_AOP_SCL, I2C1_AOP_SDA
Parts: R6822, R6823
- Check R6822 and R6823.
iPhone SE (2nd gen)
Lines: I2C1_AP_SDA, I2C1_AP_SCL
Parts: R6610, R6611, Charge-port FPC pins 13 and 15
- Known-good charge-port flex first (the iPhone 8 part fits).
- Diode-mode I2C1_AP_SDA / I2C1_AP_SCL at the charge-port FPC. Expected about 0.329 V (Repair Wiki); OL on one or both = broken inner-layer trace under the SIM tray (common SE 2020 board defect).
- Fix: jumper R6610 -> FPC pin 13 (I2C1_AP_SDA) and R6611 -> FPC pin 15 (I2C1_AP_SCL).
iPhone X (Global), iPhone X (GSM)
- mic1 is on the charge-port assembly.
Sources
- iFixit - iPhone Kernel Panics (accessed 2026-09-26)
- Repair Wiki - Troubleshoot and fix iPhone random restarts using panic logs (accessed 2026-09-26)
- iFixit Answers - iPhone X missing mic1 = charge port assembly (accessed 2026-09-26)
Hinglish me
Missing sensor mic1: Neeche wala microphone (Mic1).
Kahan dekhein: Charge-port flex assembly (bottom mic) · Charge-port connector / data lines
Known-good OEM/premium charge-port flex se swap-test karo.