I bought a book of yours that teaches you how to fix electronic things, but despite the name I saw that not many devices were included that I would like to fix
In fact, there was a time when most electronic devices could be repaired at home by a common technician, and even by people with basic knowledge. The book was written at that time and as there are still many old devices in need of repair it is still valid. However, day by day the devices become more difficult to repair due to the technology they use, which require special features to replace components in plates and components with coding that only the manufacturer knows, thus making the search for an authorized workshop mandatory. Thus, the possibility of repairing things at home is less and less, except for basic defects, and with this the devices practically become disposable. There are many cases where it is cheaper to buy a new one than to repair it.