QQ Media Player NUC Buyers Club - Setup Support

[mrcond]

Ok, I assume this is the correct thread to discuss troubleshooting / issues upon setup. If not, please point me in the right direction. But here goes:

I plugged in my new NUC to power, and connected the HDMI out to my AVR HDMI in, same HDMI jack as my previous NUC that this is replacing. Upon powering up the unit and the AVR, there is a very audible hum, like RF interference, coming through my speakers. This occurs using any of my available HDMI jacks on my AVR. In fact, the hum is there just by touching the HDMI cable to the back plate of my AVR, even before I insert the cable into the input.

The hum does not vary in volume if I change the AVR volume. I tried 3 different HDMI cables, all with the same interference. I did not have this with my previous NUC. The hum is there even when I switch to other inputs on the AVR, as long as the cable is connected. When I removed the NUC, the hum stopped. I then connected the NUC to a different system (non-surround), and it played fine with no hum. So there is some sort of interference specifically between the NUC and my AVR.

Any ideas on how I can eliminate it?

 

[kcrimson]

You could try floating the ground of the NUC and see if it’s a ground loop.

 

[letting1]

If floating the ground doesn't work, then maybe a power supply issue? Can you try your NUC power supply from your previous NUC on the new one?

 

[HomerJAU]

Ok, I assume this is the correct thread to discuss troubleshooting / issues upon setup. If not, please point me in the right direction. But here goes:

I plugged in my new NUC to power, and connected the HDMI out to my AVR HDMI in, same HDMI jack as my previous NUC that this is replacing. Upon powering up the unit and the AVR, there is a very audible hum, like RF interference, coming through my speakers. This occurs using any of my available HDMI jacks on my AVR. In fact, the hum is there just by touching the HDMI cable to the back plate of my AVR, even before I insert the cable into the input.

The hum does not vary in volume if I change the AVR volume. I tried 3 different HDMI cables, all with the same interference. I did not have this with my previous NUC. The hum is there even when I switch to other inputs on the AVR, as long as the cable is connected. When I removed the NUC, the hum stopped. I then connected the NUC to a different system (non-surround), and it played fine with no hum. So there is some sort of interference specifically between the NUC and my AVR.

Any ideas on how I can eliminate it?

I've never had any issue with several NUCs, in 3 houses and 5 installations (probably 15 NUCs)

I suspect its the Power Supply (60Hz hum).

Can you try re-routing the power cable, moving the supply to another power point (temporary). Experiment and report back

 

[HomerJAU]

Try your NUC power supply from your previous NUC on the new one

 

[mrcond]

If floating the ground doesn't work, then maybe a power supply issue? Can you try your NUC power supply from your previous NUC on the new one?

Good news, swapping the power supplies did the trick! The previous NUC had a 2-prong plug while the one with the hum had a 3-prong plug, I don't know if that is the reason. Anyway, I am back in business. Thanks all!

 

[HomerJAU]

Which power supply did you buy? This may be a problem with all of those models

(cheap Chinese imports here in AU got returned, they weren't even certified, copy fake cert logos and all, the seller has since attempted to 'pay me' to change my review to favourable!)

 

[mrcond]

Which power supply did you buy? This may be a problem with all of those models

(cheap Chinese imports here in AU got returned, they weren't even certified, copy fake cert logos and all, the seller has since attempted to 'pay me' to change my review to favourable!)

The one that was recommended in the other thread:

This is the one on Ebay US (free shipping $13.90):
https://www.ebay.com/itm/353845614239

 

[HomerJAU]

Can you try the new PS with the old Power cable please?

That will let us know it its the cable and not the supply.

 

[mrcond]

The problem must be the power supply. The hum was still there with a different cable.

 

[LuvMyQuad]

Time to return the power supply I reckon. I purchased that one off ebay, I tested all 60 NUCs with it with no issues at all. I hope it isnt a widespread problem.

 

[HomerJAU]

The problem must be the power supply. The hum was still there with a different cable

Maybe it RF interference. Try locating the new PS further away from signal cables if you can.