Q - I have a laptop from 2009. When it has 10.6.8 installed, it appears that it does not cause me problems. BUT,
when it has 10.8+ installed, it appears that it is trying to contact a wifi station or a cell tower and i can't sleep
in the same building with it.. I have no WIFI at home and the laptops' is connected via an internet cable, is this possible?
A - I suspect that what happens to you is that you feel the PC looking for WIFI networkds, or other wireless networks, even when the WIFI is OFF.
This happened to me before.
Some operation systems do that, In addition there are some application and programs that do that.
Please see this video that I took few years back, when it happened to me.
The way to stop this from happening is to disable the wireless hardware from the device driver (in WIN-XP, WIN7, WIN8, WIN10, not sure how to to it on OS).
Maybe your friend will know.
I do recommend getting an EMF(ELF+RF) meter, so you will be able "see" the radiation , to find all the sources, understand when,why and what they are emitting, manage them so that they will not, check and verify they don't emit RF any more, and also find the penetration points of the RF to your house and block then.
Please see more info about the EMF meter- http://www.norad4u.com/monitor/home-emr-meters/cornet-ed78
I hope this info helps.