Troubleshooting | NS Gen 2 switch fan speed goes high and does not provide PoE to attached devices
Learn how to diagnose and fix a NS Gen 2 switch fan speed, which is excessively high and stopping PoE output.
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Table of Contents
Affected Products
| Hardware Model/Series | NS Gen 2 switches |
| Software | firmware V4.0.4.9 (REV F) |
- Units built with firmware REV F, date code range: Dec 20, 2022 to May 23, 2023 (2249 to 2315)
Problem
A batch of NS Gen 2 switches produced with firmware V4.0.4.9 (REV F) experience issues with the fan speed increasing to high while PoE output does not function.
Solution | Workaround
This issue is recoverable by installing Netgear firmware V4.0.4.13 (REV G) using the steps below.
- Downgrade the switch firmware to version 13.0.2.34.
- Reboot and verify if issue is resolved.
- Upgrade firmware to version 13.0.4.13 and reboot.
Note
- It may be necessary to reload firmware and reboot the switch multiple times.
- If the issue persists, Netgear requests the tech-support file and will typically provide options for RMA.