Separate camera power, clock/control, autofocus/OIS, high-speed MIPI, flash/torch and ISP stages before replacing a module, PMU, filter or board component.
A black preview, shaking image, failed zoom switch or grey torch icon is a symptom family. Final repair needs stage-by-stage evidence.
Select the lens domain first because the active rails and actuator path differ by module.
Each profile keeps multiple possible domains open until a measurement or isolation test narrows them.
Use module substitution, dynamic rails, pair symmetry and active-state evidence together.
Compare all active P/N pairs against exact-model known-good readings. A mismatch/open supports connector, choke/filter, trace, module flex or sensor-path investigation. Do not bypass a filter before identifying its topology and failure.
Violent shaking can come from module mechanics, Hall feedback, actuator power or control instability. Known-good module substitution is safer evidence than using an external magnet as a diagnostic method.
If a verified compatible known-good module has the same failure, board-side probability rises—but connector, software state, shared bus and multiple-camera interlock still need consideration.
Values are retained as reference references. Exact-model known-good measurements take priority.
| Module | Rail / Signal | Source Voltage | Source GR | Resistance | State / Protocol | What abnormal supports |
|---|
A passing static measurement only proves that checkpoint at that moment.
Several direct conclusions in earlier reference material are intentionally downgraded.
It does not prove “100% logic-board fault.” Shared bus, connector, software, calibration or multiple-module conditions may remain.
External magnets can alter actuator behavior but are not a reliable or recommended fault-isolation method. Use module substitution and rail/control evidence.
Locate the exact open component or trace. Do not bridge common-mode or EMI components without confirming the circuit topology.
Compare with module disconnected and exact-model known-good values before identifying the load or regulator.
Camera state, thermal/NTC, LED flex, power boost and software interlocks can all disable the torch.
High-speed, intermittent, connector and state-dependent camera faults can survive a normal diode/voltage check.
Preserve module substitution, rail behavior, MIPI/OIS findings and final repair result.
