sometimes i stop by a repair shop that i frequently visit when i go to the district. one day, i saw the repairman there use sticky notes to keep track of his customers' devices and the problems regarding said devices.
i wanted to copy him, but i know me and i know that i can NEVER keep my sticky notes organized; so i've decided to keep a separate notebook dedicated to the electronics i'm working on. it's been great so far.
if you're someone who has a metric ton of electronics that are in need of repair, and you would like to keep track of which one suffers from what, i HIGHLY recommend keeping a repair journal.
i used markdown for the digital version of my journal, and here's how it looks like when rendered: