Last updated 31 August 2026

Technical disclaimer

This page states plainly what the measurements, current bands, rail tables and diagnostic routes on this site can and cannot tell you. Read it before you act on anything published here.

Reference values are not factory specifications

Voltages, current bands, diode/GR readings and resistance values on this site are reference observations, not manufacturer specifications. They are collected from bench work, service documentation and technician reports, and each one is labelled with its evidence tier. A value that is correct for one board revision can be wrong for the next. Always compare against a known-good board of the exact model in front of you.

A clue is not a verdict

This is the design principle the whole platform is built on, and it applies to you at the bench too:

• A current plateau narrows the branch. It does not name a failed IC.
• A hotspot localises where power is being dissipated. It does not prove which part failed internally — a shorted load elsewhere can heat an innocent component.
• DFU, EDL 9008, BROM or fastboot enumeration proves some of the boot path is alive. It does not prove storage, PMIC or CPU health.
• A restore error code identifies the stage that failed. It does not identify the component that caused it.
• A panic string names the subsystem that reported the fault. It does not name the part to replace.

Where the diagnostic engines on this site cannot support a conclusion, they say so rather than guessing. Unknown is a valid and useful answer.

Safety

Board-level repair involves DC supplies capable of destroying a board in milliseconds, lithium cells that can vent or ignite when damaged or shorted, hot air and irons at temperatures that cause serious burns, and flux and solder fumes. Work with adequate extraction, eye protection and ESD control. Disconnect the battery before working on power rails. Do not apply current limits above what the board should draw.

Data loss

Firmware operations, partition work, storage replacement and restore procedures can permanently destroy user data, and on many devices they are irreversible. Back up first where the device still allows it, and tell the device owner what is at risk before you begin.

Ownership and authorisation

Nothing on this site is intended to help anyone bypass activation locks, defeat anti-theft protection, or work on a device they are not authorised to service. Confirm ownership before accepting a board.

No warranty

This material is published in good faith and without warranty of any kind. You are the engineer on the bench. The measurement, the decision and the responsibility are yours.

Corrections

If you find a value here that disagrees with a verified measurement on your bench, send it to us with the evidence through the contact page. Corrections with measurements attached are the fastest way this dataset improves.