Wi-Fi randomly disappears on laptop. What can be the problem?

Question

WiFi

I've been dealing with this problem for 3 years now. On a laptop, Wi-Fi simply disappears for no reason at all, that is, in general, as a function, it disappears from the panel below, as if it had no part at all (sorry for the teapot's language). It happens just for real out of the blue. Sometimes this may not happen for weeks and everything is fine, sometimes, on the contrary, there is no Wi-Fi and no, until one day you once again turn it on with hope and it appears. That is, no regularity like. At first I sat on Windows, suffered, reinstalled, it didn’t help, now I put Ubuntu next to it, and at first there was no problem (but apparently I just got lucky and for the first time using Ubuntu fell exactly the interval when everything was ok for a long time). Now I'm suffering again, both on Windows and on Ubuntu. Most of the time it looks like this: turn on the laptop, wi-fi works, after an n-th period of time (maybe 10 minutes, or maybe a whole day, if you're lucky) wi-fi suddenly disappears, it's on, I restart my laptop, wi-fi appears (or maybe not), and I continue to them I use it, maybe 5 minutes, maybe a few hours, how lucky. But yes, it may not appear after the restart, or it may not appear initially, and only if I leave the laptop lying down and turn it on later, it will appear. He took it to the repair to repair the case and also mentioned this problem, they said, they say, the problem is in the antenna, which is at the junction of the monitor and the lower unit, such a long one, lies across (again, sorry, I don’t rummage). They said they'd replace it and gave away the old one. But it didn't help. And yes, since I said that I was wearing it for repairs, I will mention that the laptop fell earlier, sometimes weakly, once it was normal. I don't remember exactly when the problem started. but it is quite possible that after that. It was just a long time ago, the problem is also not new, so I don’t remember. It is interesting that after various manipulations, seemingly not involved in the problem, it may have some kind of impact. For example, when I disassembled the laptop for fun, took out the memory there, disconnected the wiring, and then reassembled it, the problem suddenly disappeared for a long time (and just before disassembly, it was there for a very long time. That is, it WAS, even for a little bit almost disappearing In short, there was no Wi-Fi for a long time). Or if I use the laptop for a long time in one position, and then I move it somewhere, after that sometimes it can also, for example, cut down Wi-Fi. In general, all this makes me think that the problem is of a mechanical nature, although even if the laptop does not move at all, Wi-Fi disappears and appears anyway, everything is the same without any regularities, and sometimes a reboot will help, a matter of luck. In general, I hope there are people here who may have thoughts on this matter, or if you have friends rummaging through laptops, please ask, because I don’t really want to copy-paste this to other sites. So far, I'm slowly disassembling the laptop (some screws are licked off) and I want to at least just clean it, or maybe I'll find some problems in the connections. It’s just bad that I can’t seem to understand where the network card is or what should be there, responsible for wi-fi, but I will try. Notebook Lenovo Ideapad 100-15ibd. because I don’t really want to copy-paste it to other sites. So far, I'm slowly disassembling the laptop (some screws are licked off) and I want to at least just clean it, or maybe I'll find some problems in the connections. It’s just bad that I can’t seem to understand where the network card is or what should be there, responsible for wi-fi, but I will try. Notebook Lenovo Ideapad 100-15ibd. because I don’t really want to copy-paste it to other sites. So far, I'm slowly disassembling the laptop (some screws are licked off) and I want to at least just clean it, or maybe I'll find some problems in the connections. It’s just bad that I can’t seem to understand where the network card is or what should be there, responsible for wi-fi, but I will try. Notebook Lenovo Ideapad 100-15ibd.

Answer 1

For wi-fi, this little thing is responsible. She is likely to be replaced. Her price is 500 rubles. Usually, the replacement takes place without dancing with a tambourine, but sometimes with dancing, Google will help.

Answer 2

I support the answer given by Vladimir
But there is an alternative solution:
https://market.yandex.ru/search?text=wi-fi%20usb%2...