It would be possible if you have the proper testing equipment and electrical tools to do the job.
It does not require a college degree to repair computers although it would give you the knowledge you need in order to excell in this field.
A place that repairs computers.
Computers
Decrease in computer resources cost.
Increase in the price of computer.
Producers expectation of a computer prince increase.
Someone who would like to learn how to fix and repair computers should take Computer Science classes and possible Electrical Engineering courses. These will teach the basics of programming and circuits. However, in most normal cases such as replacing RAM inside of a computer or a video card, coursework is not necessary.
Yes, originally they weren't but our society has grown dependent on technology over the years and without computers our society would collapse beyond repair.
No.
Yes, there is a company that specializes in hard drive repair. One of them would be DTI.
It would be safer and to purchase a new power supply,a repaired power supply might pose a fire hazzard.
Computers require their own internal power supply because the power required to power most newer computers, especially with high-end graphics cards, would require a bulky power supply which wouldn't be ideal in transporting computers or aesthetically. Also, with all of the other internal parts of a computer, some type of power interface would be necessary within the PC anyway, so why not just bundle it all together?