How to get into the electronics sector when you have no related academic qualifications and work experiences?

Professional Conversion Programmes (PCPs) are career conversion programmes targeted at Professionals, Managers, Executives and Technicians (PMETs), including mid-career switchers, to undergo skills conversion and move into new occupations or sectors that have good prospects and opportunities for progression.
In the first place, if you have some core skill sets that are transferable, call them out in your resume. For example, systematic problem solving, quality management system, facility management, etc, they are all relevant in electronics industry.

• Julie Koh

Unfortunately the easiest way is with a related degree (usually any engineering).

Based on your question, while not impossible, will be very difficult. You will need experience in something similar. For example, you can do supply chain, sales, lean, etc for an electronics company first. These are work scopes that are largely the same in any sector. From there you can work your way into what you want.

Alternatively you can try for a entry/mid level role and cite knowledge from your previous jobs and what you can do to help with your "outside perspective"