HDMI transmitting power supply noise?

[GranteedEV]

AS the thread title states, when I've got my laptop plugged in to both its power supply and the HDMI cable I've started getting some really bad noise.

It's not a ground loop. These are higher in frequenciy.. not sounds you want to be hearing.

I think it may be the power supply or the laptop's motherboard, and I'm wondering if anyone has experienced this before?

 

[jinjuku]

If you are running just off of laptop battery?

 

[GranteedEV]

If you are running just off of laptop battery?

No noise if the laptop isn't plugged in but unfortunately a charge will only last around 75 minutes.

 

[GranteedEV]

I ordered a new Laptop PSU and just plugged it in. No HF noise!

 

[Todesengel]

Thats interesting. I thought a digital signal (such as that carried through HDMI) was immune to noise as its an all or nothing sort of thing.

 

[aus10]

AS the thread title states, when I've got my laptop plugged in to both its power supply and the HDMI cable I've started getting some really bad noise.

It's not a ground loop. These are higher in frequenciy.. not sounds you want to be hearing.

I think it may be the power supply or the laptop's motherboard, and I'm wondering if anyone has experienced this before?

I had a similar issue before i wasnt using hdmi i was just using the 3.5mm cable too a sony bookshelf system and i noticed when i had it on the charger it was making a weird noise in the back ground but once i took it off the charger it quit making that noise... i dont know how to get rid of it on the laptop.. i use my ipad instead lol