| Problem | Likely Cause | Free Solution | | :--- | :--- | :--- | | "Upgrade failed" message | Wrong firmware version or corrupted file | Re-download from a reliable source. Verify hardware version. | | Meter won't turn on after upgrade | Power loss during flash or incorrect bootloader | This is often irreversible without a JTAG programmer. | | USB drive not recognized | Drive not FAT32 or too large (>32GB) | Reformat to FAT32 using a small-capacity drive (2–8GB). | | New satellites missing | Forgot to factory reset after upgrade | Perform factory reset via system menu, then rescan. |
You will need: