Thank you mon2 for your message and your pieces of advice.

I've done the following measurements as suggested:
[TABLE="class: MsoTableGrid"]
[TR]
[TD][FONT=Calibri]Inductor[/FONT][/TD]
[TD][FONT=Calibri]Resistance[/FONT][/TD]
[/TR]
[TR]
[TD][FONT=Calibri]L5230[/FONT][/TD]
[TD][FONT=Calibri]2.2 MOhm[/FONT][/TD]
[/TR]
[TR]
[TD][FONT=Calibri]LC320[/FONT][/TD]
[TD][FONT=Calibri]1.8 MOhm[/FONT][/TD]
[/TR]
[TR]
[TD][FONT=Calibri]LP800[/FONT][/TD]...

Hello everyone,

[U]About me, my goal and the equipment I (don't) have:[/U]
I am brand new to this forum, and I am eager to learn about repairing laptops. I have an engineer background although I haven't done electronics for a while. I have watched several Youtube videos in the last two months, trying to understand how to diagnose a faulty motherboard. I have a USB-C Amp meter and a classic multi meter. No DC Power Supply to inject voltage, no soldering iron to replace components.

[U]About my issue and my goal:[/U]
A friend of mine has a MacBook Air M1 A2337...

Hello,
I have discovered the world of microsoldering a few months ago, and I want to develop these skills in order to repair macbooks and laptops that some repair shops won't even try to repair. In order to do microsoldering, I need to learn how to diagnose faulty motherboards, and that is why I am here. I will follow a training in microsoldering, and am willing to learn a lot on my own about diagnosis.
Cheers,
mkdj