Does the laptop have a very strange effect on other devices nearby?

Question

ASUS

Lords and Ladies!
I'll start with the background, perhaps this is somehow relevant.
There was such a problem. Living for some time in India, I bought as a temporary replacement for a MacBook that failed due to ants, ASUS VivoBook F202E in a metal case (with our plug), this device worked well there (as far as it could according to performance characteristics). On the last night before flying back to the Russian Federation, a small emergency happened in the place where I lived, the whole village was left without electricity, and not just without it, the poles blazed with sparks just like that, and the sounds from exploding light bulbs were carried around like a machine gun trill. I can't be sure that at that moment the laptop was plugged in, but most likely it was.
After arriving in the Russian Federation, the laptop was thrown somewhere in a box and they didn’t remember about it for half a year, then one of the relatives urgently needed a laptop and I decided to give the non-Russian gadget gathering dust. Here the most interesting thing began - the device worked fine, only when it was not connected to the network, when the charging unit was connected to the network, the cursor, when you clicked on the touchpad, began to run madly around the screen, when you clicked on the screen itself (there is a touchscreen), it was clear that the laptop sees several clicks in one line at once. After that, the laptop was abandoned again, and another candidate from acer was given in its place. Another six months passed and I decided that I needed a small laptop with ubuntu on board, remembering old problems, I decided that it was about charging, in a strange way, I didn’t find a charger suitable for a laptop in the city (to be honest, I searched quickly and not very hard) and, having no desire to conduct experiments, I gave the laptop for repair with a detailed description of the problem. Recently they returned it to me, saying that everything was done, they say, use and enjoy. I turned on the laptop, the touchpad and the touchscreen work fine without charging, I connected the charger - everything is also good. Well, in fact, I decided today to put Ubuntu on it, drove it on a macbook in search of downloading an image of ubuntu, and thought about how many bits I have there processor. I took asus in one hand, which was plugged into the socket, and with the other hand on the poppy began to move along the touchpad - the cursor barely moves and shifts to the left. I'm in shock, everything was just fine, although I already had this three times due to various combinations of circumstances (liquids and damned ants) and I thought that I would probably have to change the touchpad and keyboard on the laptop again, put off asus and oh my, the touchpad more or less came to life, the cursor moves with a slight rattle. I took asus in my hand - the cursor does not move. Postponed - everything works more or less, plugged the asus charger from the outlet - everything works fine. I conducted an experiment, there is still hp next to the poppy, it has the same trouble with the cursor, the iPad generally madly perceives any attempts to use it, and this is all taking into account the fact that the devices are located from asus and its charging at a distance of a couple of meters and to asus itself, I don't touch. But at the same moment, when charging is on, the touchpad and touchscreen on asus work perfectly.

Answer 1

Nothing so supernatural. You have a 50-100 kHz high-frequency converter in the PSU, and apparently, due to a thunderstorm, the part of the circuit responsible for filtering this noise does not work a little incorrectly. High-frequency and ultra-high-frequency currents can even pass over the surface of some dielectrics, and a person does not feel them at all (except that at high voltage / current strength, the hairs move on the skin and all that), so the whole snag is in the Asus power supply. Change all the capacitors in it first, maybe the problem will go away.
I had a similar problem in my tablet, it was simply unrealistic to use the touchscreen when charging, a cheap Chinese 7 "for $ 42. I opened the charger, put in a filter capacitor with a slightly larger capacity and voltage, for which I drank the case a little, and everything became fine.

Answer 2

Most likely, the power supply is coming to an end and high-frequency pickups are coming from it ...

Answer 3

I bought a Chinese charger for a macbook and mysticism also happens) The monitor of an ordinary PC stupidly turns on and off by itself, the touchpad is terribly buggy) It's scary to use such a city.