I am engaged in computer work 16 years. For maintenance, my personal opinion is

1, want to have professional knowledge (mainly basic theoretical knowledge should be firm. That is, you need to know how all kinds of hardware work)

2. Have a certain foundation of electronic technology (equivalent to the foundation of home appliance maintenance).

3. Experience is very important. And experience comes from accumulation. Some things can't be taught.

4. Hardware maintenance is easy to learn, but difficult to learn. On the one hand, we must work hard, on the other hand, talent is also very important.

Unless you have studied this major, I suggest you switch to software or computer maintenance. The threshold and difficulty are relatively low.