Ticking

Dear all I'm new here I've a question any help appreciated. I hear a tick sound from my TV / cables /fire stick / extensions / now TV box not sure where from. I checked everything and I could not find anything. And I've got feelings it's not coming from any fault or faulty device /wire. I did a...

I bought a lenovo ideapad y510p sli 750m with a 170 watt power brick a week ago and i noticed a clicking noise coming from the power brick when it was next to my laptop otherwise it is too far away to hear it. It only happens when i'm using low power like browsing the web. My wattage meter says...