came to post this, been my experience to a t. always start in places where things move, get plugged in, switches, look for exposed/funky looking traces/boards/connections. almost always an easy win once you crack the thing out (which can be a struggle)

sometimes watching youtubers like bigclivedotcom cover failures of cheap electronics can show spectacular exceptions though. for some more realistic failures of common consumer hardware like laptops and cellphones (and general rework wizardry) Electronicsrepairschool is pretty hard to beat

https://www.youtube.com/c/Bigclive

https://www.youtube.com/c/Electronicsrepairschool