How to make an old phone

Question

Do it yourself

DD. Somehow I walked through our services and somehow everyone refused to repair the old LG p350, or they broke the price and didn’t really listen to what didn’t work = /
In general, the phone was used as a home phone and completely satisfied, you can, of course, buy a new one, but I would like it fix.
There is only one problem - the lower part of the sensor does not work, i.e. you can't really use the bottom icons on the screen. So far I don’t even know how and where to diagnose the norms, maybe a software problem, or maybe hardware.
I started looking on the Internet for a new sensor, but Ali is silent, and ebay asks for more than this phone costs today and this is without delivery, which is 1.5 times more)
Maybe there are some sites where you can get spare parts cheaply? + so that international delivery is
If there are thoughts why only the lower part does not work, then I will be glad to experiment)

Answer 1

the price is "100 rubles per bucket" :), so it's easier / cheaper to buy than to repair, especially if there is no knowledge in this.
https://www.avito.ru/rossiya?q=LG+P350

Answer 2

It only makes sense to repair if the phone is as expensive as memory.