Diagnostic Engine · Current Draw

Current Draw Diagnosis

Read board power consumption with a USB ammeter, lab supply, or current meter — then map the reading to the most likely failure stage. Every direction here is reference-only until bench or field confirmation.

0 mA

No Power Draw

Board is dead — possible short upstream of PMIC, no main rail, broken USB charging path, blown protection IC.

Reference Only

10–40 mA

Standby / Charging Only

PMIC is alive but the device is not booting CPU — possible eMMC/UFS init failure, missing clock, dead processor rail, or charging-only state.

Reference Only

40–150 mA

Bootloader / Idle Boot

Board is reaching low-level boot — preloader, fastboot, or recovery state likely. Check tool log to confirm which.

Reference Only

150–400 mA

Boot Animation Range

OS is loading — if device hangs at logo, the issue is software/partition level, not main power.

Reference Only

> 500 mA Idle

Short Circuit Suspect

Steady high current at idle is a short — disconnect, inspect rails, check for hot components with thermal camera.

Reference Only

Spikes / Cycle

Boot Loop Pattern

Current rising then dropping repeatedly — partition fail, kernel panic, watchdog reset. Read serial log if available.

Reference Only

Evidence required before final repair: measurement reading (mA), boot stage observation, tool log, board photo. Mark record as bench_confirmed only after repeated lab confirmation.

Route Case via Hub Charging Diagnosis Storage Diagnosis