Good day, I have a TS-469L NAS with 4 drives here. Suddenly, the NAS is no longer discoverable on the network. I noticed that the LAN LEDs on the network port light up during startup and then go off. Is this a hardware problem?
If the NAS is defective, can I use the hard drives in a new NAS from QNAP?
Thank you for your help
First, remove all drives (turn off NAS!) and mark their positions in the NAS, then check if the web setup loads. (If necessary, use QFinder to locate the NAS). If the NAS is still not found, try a firmware recovery:
https://www.qnap.com/en/how-to/faq/article/nas-firmware-recovery-guide
If this also doesn’t work, the drives could be transferred to a new QNAP NAS (but it’s better to start fresh and restore from backups—those are available, right?)
Thank you for your reply.
No access even without drives
How am I supposed to install firmware if I have no access via the LAN interface?
And the NAS is not mine and there is no additional data backup.
The guide explains how a firmware recovery works.
If there is no data backup (“more” is not correct if there is none, don’t confuse RAID with a backup), then consulting a data recovery specialist is mandatory at first. If the condition of the drives is unclear, any further changes can lead to (more) data loss.
A new realization from me.
Without a hard drive, it boots up and Qfinder can also find it. After about 2 minutes, the LAN interface turns on and stays on.
With a hard drive, it boots up to the point where even after 10 minutes the LAN interface turns on, but I can’t find the QNAP in Qfinder. All the hard drive LEDs in the front are green, but unfortunately, nothing more happens.
Can I now try removing one hard drive after another (after shutting down) to see if it will start, or do all 4 drives need to stay in? Maybe one of the drives does have a problem after all.
Hello,
All 4 HDDs should remain installed.
With 4 HDDs, it’s probably a RAID 5. If you start the NAS with only one HDD at a time for testing, the RAID 5 will likely be destroyed. So, not a good idea.
In post 3, it says the NAS is not yours.
Possibly, the owner set a static IP address from a different range.
A 3-second reset might help here.
How can I reset my NAS? | QNAP
With the old QTS, the admin password would then be “admin”.
If the data is so unimportant that the data recovery specialist is ignored, a firmware repair can also be performed.
Start the NAS without any drives and, as soon as the web setup has started, insert all the drives. The NAS will recognize existing QTS drives and offer to perform a non-destructive firmware recovery.
Afterwards, all shared folders must be recreated manually (just like after a 10-second reset).
https://www.qnap.com/de-de/how-to/faq/article/wie-stellt-man-freigabeordner-wieder-her-nachdem-man-ein-qnap-nas-auf-die-werkseinstellungen-zurĂĽckgesetzt-hat
No, I wouldn’t have taken out all the drives except one, but rather left one out and kept the other three inserted. However, that hasn’t helped so far.
Yes, it’s not mine and was used in a craftsman’s office. The customer has no idea about his installed IT and I didn’t set up this QNAP. The original installer is no longer reachable. Now I’m trying to get the QNAP running again and only have limited knowledge about it. The data on the NAS is important for the craftsman. Unfortunately, he also doesn’t have a backup. He was either completely misadvised or ignored the advice.
The NAS is now only connected to my Windows 11 computer, and without any drives it boots up with the confirmation beep and Qfinder can find it. But with the drives inserted, it doesn’t.
I’m not ignoring the data recovery specialist, but I’m trying to keep the costs as low as possible while still getting some sign of life from the NAS, so that the craftsman can access his data again. Thank you for your tips. If the data isn’t deleted in the process, I could also try a firmware recovery. I might need phone support for that.
Of course, I don’t want to destroy the data on it. The error actually occurred overnight. The next day, the craftsman program could no longer access it.
The person who set everything up (from the private sector) is no longer reachable, and the craftsman has absolutely no clue about IT.
Then you should contact QNAP Support, they also have a German branch.
Heureka 
Many thanks to dolbyman and especially to Becker2020.
The tip with the 3-second reset was absolutely spot on!!!
This morning I went to the office, left the NAS running overnight, and saw that I still couldn’t access the NAS and the third hard drive was now showing red. Then I did the 3-second reset. And lo and behold, I could access the NAS again. Entered the default administrator admin admin and quickly saved the folders to a computer. Huge relief for the technician. After Easter, I’ll set up a proper backup solution.
Problem solved! Thanks, keep up the good work. 