This is puzzling me. There's a fan like noise on ac but the fan isn't running and the HDD isn't running either. It's not really loud but it's there, I guess just general laptop hum. But unplug the laptop and it goes really silent. It's fantastic. I've checked power options and gone through all advanced settings, only difference is 10% screen brightness. Temperature is the same, it's currently 39 on battery, which is usually where it is on ac. Any ideas as to why the difference.
SF315-52 with 512gb SSD and mechanical 1tb.