0x500000 — SMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; the value 0x500000 matches, bit for bit, charging port (0x100000) + wireless coil (0x400000), a combination reproduced in the lab; iFixit and iPad Rehab, however, attribute it to the battery. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent.

Sources disagree on this code. Both readings are shown: confirm with a known-good part.

On iPhone 14 Plus, iPhone 14

Charging port + wireless coil (DFRWS test) — or battery according to iFixit

Medium confidenceDisputedSMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; the value 0x500000 matches, bit for bit, charging port (0x100000) + wireless coil (0x400000), a combination reproduced in the lab; iFixit and iPad Rehab, however, attribute it to the battery. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent.

First check

Start with the charging port flex and the wireless coil flex (seating, corrosion, known-good parts); if nothing changes, test a known-good battery and measure the battery connector in diode mode.

iPhone 14 Plus ›iPhone 14 ›

On iPhone 15 Pro Max, iPhone 15 Pro

Charging port flex + wireless charging coil

High confidenceVerified sourceSMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, two sensors are missing: charging port (0x100000) and wireless coil (0x400000), a combination reproduced in the lab. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent.

First check

Check/test the charging port flex and the wireless coil flex.

iPhone 15 Pro Max ›iPhone 15 Pro ›

Sources