Louis Rossman
https://www.youtube.com/channel/UCl2mFZoRqjw_ELax4Yisf6w
Routinely shows bench scope detail of him doing circuit troubleshooting and replace of "no user serviceable parts" modern surface mount Apple stuff, but in the process shows good heart and entertaining moxie.
EEVBlog (David L. Jones)
https://www.youtube.com/user/EEVblog
Likes to take things apart and people send him things, but he is a great teacher and gives an amazing does of theory and design practice, and (very rare!) his electronics design knowledge spans part and practice back to the early 1970s.
bigclivedotcom
https://www.youtube.com/user/bigclivedotcom/videos
Famous for his teardowns of the most ludircous and trashy designs, he's a maverick experimenter who plods along and pokes and prods and touches things he shouldn't, just like you would.
I do not recommend Louis Rossman. Instead of learning, you’ll listen to endless hateful anti-Apple rants, deceitful personal attacks and unsubstantiated speculations of how terrible Apple engineers are - the whole community is cultish and they love listening to LR just about anything. I despise his channel and his popularity.
Rossman has earned his grumpy and acerbic attitude in an old fashioned and honest way: routinely repairing expensive devices that were not meant to be repaired. Having to salvage working components from salvaged boards because the manufacturer decided not to supply them. His board working technique is first rate and he goes to great lengths to show you every step of the process. You learn things even if you were to mute the audio and play "Endless Sax Man" instead! How many other Youtube channels would survive that treatment?
Apple engineers are first rate also, but they've been dis-incentivized to do anything that would make affordable component level repair part of the life cycle, its parts distributed widely enough to be accessible, and technicians (factory trained or otherwise) capable, Unless this corporate approach FAILS spectacularly in the end, the human race is heading into a cul de sac of evolution by having its most essential technologies hanging by tiny threads. Some day Apple will decline and their newer technology will all be in the landfill... and Rossman will still be repairing last-generation boards.
But... by failing to make things repairable and removing whole customer care layers from their business plan, Apple has managed to bring prices down! That's a joke BTW
EEVBlog (David L. Jones) https://www.youtube.com/user/EEVblog Likes to take things apart and people send him things, but he is a great teacher and gives an amazing does of theory and design practice, and (very rare!) his electronics design knowledge spans part and practice back to the early 1970s.
bigclivedotcom https://www.youtube.com/user/bigclivedotcom/videos Famous for his teardowns of the most ludircous and trashy designs, he's a maverick experimenter who plods along and pokes and prods and touches things he shouldn't, just like you would.