| Issue | Likely Cause | Solution | |-------|--------------|----------| | “Firmware upgrade failed” | Wrong model file | Re-download correct firmware for exact model number. | | Modem not booting after update | Power loss during update | Use TFTP recovery method (see 3B). | | Wi-Fi disappears after update | New driver requires reset | Perform factory reset, then reconfigure Wi-Fi. | | No internet (LOS or PON light blinking) | ONU authentication lost | Re-enter your ISP’s LOID/SLID or serial number (under GPON Setup). |
Before we dive into the technical steps, let’s understand the "why." A firmware update is not just about new features; it is about the operational health of your connection. syrotech modem firmware update
You didn't go through all this effort for nothing. Verify the update succeeded. | Issue | Likely Cause | Solution |