Why is my NAS not accessible or not visible in Qfinder Pro after a power outage?

Last modified date: 2025-07-02

Applicable Products

QTS, QuTS hero

After a sudden power outage or voltage surge, your NAS may no longer be visible in Qfinder Pro, or accessible via the web interface, or bootable.

Possible symptoms may include:

A QNAP NAS may fail to boot after an unexpected power loss due to:

Corrupted internal firmware (DOM/Flash): If the firmware was being accessed or updated when power was lost, it may be damaged.
Unstable or faulty drives: Drives with critical errors may prevent the NAS from completing system initialization.
Interrupted firmware upgrade: If a power failure occurred during a firmware update, the system bootloader or OS may be incomplete.
Network misconfiguration: DHCP or IP resets may result in the NAS not being reachable.

If the NAS boots and you hear the beep: This confirms that the system firmware and hardware are working. Proceed to Step 2.
If the NAS still does not boot: The issue could be a corrupted DOM or mainboard failure. Refer to the NAS Recovery Guide or contact QNAP Technical Support.

If the NAS boots without drives, the issue is likely related to the drives.
Identify any drives previously flagged with SMART errors, abnormal noises, or system logs.
Insert a drive that you believe is healthy and power on the NAS.
Insert another drive and test again.
Continue until you identify the drive (or multiple drives) that prevents successful boot.

If the NAS boots successfully:

Connect the NAS and your computer to the same subnet.
Use Qfinder Pro to locate the NAS on your network.
If the NAS is still not visible:
- Try a direct Ethernet connection with static IP address (e.g., NAS: 192.168.1.100 / PC: 192.168.1.101).
- Reset the NAS network settings by pressing and holding the reset button for 3 seconds. This only resets the admin password and IP settings.
- Do not perform a 10-second reset unless you understand its full impact.