| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | Upload fails at 50% | Flash memory corruption | Perform a factory reset (Maintenance > Backup > Factory Reset) before the update. | | “Invalid Signature” | You downloaded a firmware for the DRG737 (v1) or a different regional variant (EU vs APAC). | Find the exact hash match. Check forums for your specific ISP. | | WiFi disappears after update | The new firmware reset the radio region code (e.g., DFS channels). | Go to Network > WLAN > Select your country manually and reboot. | | Router cycles Power/DSL lights | Update failed; device is in "Safe Mode." | Use the TFTP Recovery method in Part 4 immediately. |

Some ISPs allow manual updates, but you first. Do not use files from third-party websites.

You will need administrator credentials.

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      CELLULAR AND MOLECULAR PHARMACOLOGY (First Year M.Pharm Semester 1)
      CELLULAR AND MOLECULAR PHARMACOLOGY (First Year M.Pharm Semester 1)