Troubleshooting
Start with the symptom you can observe. Apply one change at a time, then retry.
| Symptom | Check | Fix |
|---|---|---|
| A PCIe card or a fan gets no power | Is the board running from USB-C only? The PCIe slot and the fan headers take their 12 V only from the ATX supply. | Connect an ATX power supply to the 24-pin connector. |
| The module does not boot from its eMMC | Is a jumper on pins 1 and 2 of the service header, marked FIT JUMPER TO DISABLE eMMC BOOT? It holds the module in rpiboot mode. | Remove the jumper once flashing is done. |
A camera or display on CAM/DISP1 is not detected | Are both jumpers fitted on the header marked FIT TWO JUMPERS FOR CAM/DISP 1? | Fit both jumpers. |
| The module's EEPROM cannot be written | Is a jumper on pins 3 and 4 of the service header, marked FIT JUMPER TO DISABLE WRITING TO EEPROM? | Remove the jumper while you write the EEPROM. |
Still blocked?
Ask on the community forum. Include the following so someone can reproduce it:
- product name and SKU: Sentinel Core,
333435 - the Compute Module you fitted (CM5 or CM5 Lite) and the operating system on it
- complete error text or unexpected behaviour
- power source (ATX supply or USB-C) and what is connected to the board
- the jumpers fitted on the service header and the
CAM/DISP 1header - a clear photo of the board