I got my first job in pc repairs as an apprentice when I left school. I sent in my CV with a letter and turned up to the interview wearing a suit. The main thing I think is to make a good impression.
Altho I was an apprentice full-time and was really doing it 100% including day-release at college each week. I think given the type of job, looking for part-time isn't that good/hopefull.
You could write to them for work experience, then you have a few weeks to make a good impression on them. But I really can't see anyone getting a job in the industry being 15 and having no qualifications (yet), but also only offering 1day a week.
If you know what you're doing and can help people by repairing their pc's then maybe put some flyers around locally and make your own company. £20/hour call-out fee's etc soon add up. Esp if you're only 15.
I think before you do call-outs tho you need confidence and experience.
Being 15/16 is quite hard really, we've all been there and getting a proper job where you do what you want to do is very hard. Especially if you have no qualifications.
It's hard enough without a years experience. (which college/uni leavers even find)
Working as a computer engineer, I've found experience & interest counts for a lot. I've seen people come from university with qualifications who can't put any of it into practice and when it came down to it they couldn't cope and lasted a month or if they were lucky maybe 2months
