I also contacted the retailer again who simply told me that they found no noise, nothing wrong with the device and it must be me - yeah, great, thank you. Any ideas what the problem could be and how to solve it? Any help is appreciated. Now I do a restart via the web interface adn the noise is gone. I turn it on, a little later the noise begins. After another restart however the noise is gone So just be clear, the system is powered off. (latest firmware is installed) Then I did turn off this setting entirely but after turning off and on the noise is back.

Sooo, I assume the noise is related to SW rather than an HW issue. Yeah I had that 3 times yesterday after the patch, it was when I was waiting at the station to take over a service. I have never had this happen before today. What the heck is it and how do I turn it off. After a restart it worked fine: LED went off after 5 minutes AND more importantly there is no noise! And this is repeatable. All of a sudden everytime I start on a service withe the Class 43 I gert some high pitched fast bleeping.

As the NAS is for music only and nothing was going on on that machine I asked myself why is the LED not coming off. Now while fiddling with this Thing and trying to identify the root cause myself I noticed something really weird: When I perform a restart after the system had just booted - the noise is gone I tried this as the LED never went off (there is a setting in Hardware to move into stand-by mode and turn the LED off after 5 minutes of inactivity which I turned on). Contacted QNAP Support again two days ago again and waiting for their reply. Next day (the NAS is powered down during the night and powered on the next evening again) the noise is back. Put the SSDs in, turned it on - no noise, wonderful. The device was sent to support and came back after about 10 days including a note saying 'repaired by manufacturer'.

So I contacted QNAP Support who told me to contact the retailer which I did. BTW: I found other reports on Amazon which describe the same problem, unfortunately too late. I purchased this item specifically for my livingroom and there is no way I will accept this noise. It also doesn't come from the SSDs, as when I pull out the SSDs, the noise will continue for about 20 seconds (yeah, I know I shouldn't do that and I have to run fie check afterwards but this noise drives me nuts). I did a little testing and the noise seems to come from the NAS, not the power supply. Well, it turned out that this device is producing an annoying high-pitch sound which I can hear (when reading and not listening to music) from several meters distance. I also got myself 2 SSDs to avoid any potential heat issues or noise form the hard drives. I purchased this specific model as it is placed in my living room. Hi there, I have got myself a HS-251 NAS which is dedicated to my music files.

Annoying high pitch sound app