Hardware Failure After Power Outage: How to Process an RMA for Port Failure

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Problem Scenario
After experiencing unexpected power cuts and power supply fluctuations, a physical port (such as Port 9) on the switch (XS1930-12HP-IOT) has completely stopped functioning, while other ports (like Port 8) continue to work normally with connected devices.
Solution: This issue is typically caused by electrical damage during power outages and is identified as a hardware-related failure. To resolve this, you will need to proceed with the Return Merchandise Authorization (RMA) process to get the hardware repaired or replaced.

Device Information:

Model: XS1930-12HP-IOT
Firmware Version: V4.80(ABQF.5)

Action Steps: Submitting an RMA Request
Step 1: Verify the Hardware Issue

Disconnect the device from the unresponsive port (Port 9).
Connect a known working device (e.g., a TV or computer) to an adjacent working port (e.g., Port 8) using the same Ethernet cable to confirm the cable and client device are functional.
If only the specific port remains dead, it is confirmed as a localized hardware fault.

Step 2: Collect Your Device Details
Before submitting your claim, gather the necessary information from your device's sticker or the local/Nebula management page:

MAC Address
Serial Number
Firmware Version

Step 3: Submit the RMA Application

Visit the RMA portal to initiate your return request.
Follow the detailed step-by-step instructions outlined in the official guide: How to Process & Submit an RMA.
Complete the form with your device specifications, describe the port failure after the power cut, and submit the application for review.

Troubleshooting
Scenario 1: Is port damage caused by power cuts covered under warranty?
Yes, physical port failures resulting from electrical fluctuations during power cuts are generally covered under our limited lifetime warranty, provided there is no external physical damage or liquid exposure.
Scenario 2: What if the entire switch remains offline after the power cut?
If the device fails to boot or register online after power is restored, please perform these diagnostic steps:

➡️ Verify that the power outlet is active by testing it with another appliance.
➡️ Try using a different power cable to rule out cable failure.
➡️ Power cycle the unit by disconnecting the power cord for 60 seconds, then reconnecting it.

Appendix: How to Prevent Hardware Damage from Power Instability? (Best Practices)
To protect your network infrastructure from being damaged by sudden power cuts, voltage drops, or electrical surges, we recommend taking the following precautions:

Connect your network switches to an Uninterruptible Power Supply (UPS) to maintain stable power during short outages.
Utilize dedicated surge protection devices on power outlets to block sudden voltage spikes when power is restored.
Ensure your networking rack and switches are properly grounded to safely redirect excess electrical charges.