: Focus on the Snapdragon 710 power management lines if the device is completely dead (no power).

He traced the power rail. VBAT met the PM660L power management chip at coordinate B4. He moved his multimeter probes with the precision of a surgeon. "Come on," he whispered.

For visual pathing (e.g., charging, display, or mic ways), tools like Borneo Schematics provide high-quality color-coded images for specific circuit troubleshooting.

If you cannot find a full schematic, a (board view) is useful for micro-soldering. Search for:

: Identifying the backlight IC and the FPC connector pins is vital if the phone has sound/vibration but no image.

Pinpointing the USB-C controller IC and checking the path from the charging port to the battery connector.