If the CM4 shows power but doesn't boot, identify the voltage regulators (buck converters) using the schematic to check if they are generating the necessary voltages. PCIe/USB Failure: Trace the differential pairs (
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: The exact location of every resistor, capacitor, and IC. If the CM4 shows power but doesn't boot,
Mastering the CM4: Troubleshooting with 94V-0 Standards & Boardview Files : The exact location of every resistor, capacitor, and IC
A standard PCIe connector allows for expansion cards (like NVMe SSDs, AI accelerators, or extra network interfaces). 6. GPIO Header
| Pin | Signal | BoardView Net Name (typical) | |-----|--------|------------------------------| | A1 | GND | GND | | A2 | 5V | VIN | | A43 | PCIe_RXN | PCIE_RXN | | A44 | PCIe_RXP | PCIE_RXP | | B45 | USB_D_P | USB_D_P | | B46 | USB_D_N | USB_D_N | | A49 | HDMI0_SCL | HDMI0_SCL | | A50 | HDMI0_SDA | HDMI0_SDA | | B10 | GND | GND |