If you want to learn computer maintenance, you need systematic study. If you teach yourself or find acquaintances, you can learn something, but the improvement of technology in the future is limited. You can go to Shenzhen Senxinyuan School, where the teachers' skills are not bad and the school scale is quite large. The school is very formal, and several colleagues in our factory are now studying computer maintenance in their spare time. You can go and have a look.