If you like this type of stuff, I highly recommend the YouTube channel "TronicsFix"[0][1].
[0] https://www.youtube.com/c/Tronicsfix/featured
[1] https://www.youtube.com/c/Tronicsfix/videos?view=0&sort=p&fl...
[0] https://www.youtube.com/c/Tronicsfix/featured
[1] https://www.youtube.com/c/Tronicsfix/videos?view=0&sort=p&fl...
There's probably other better channels. Anyone?
* you can never have too much flux
* do not clean the board before fixing it (corrosion can help point towards the actual cause of the issue)
* importance of the availability of schematics