Starting from the polarized capacitor PC1026, in continuity mode I get a beep on each pad as well as on all components along the line.
In resistance mode, I measure 0.23 ohms across capacitor PC1026....

Hello,
I need your help with an issue I'm encountering while diagnosing a NM-D471 REV 2.0 motherboard from a Lenovo laptop. The laptop won’t power on. I started by checking the power rails, including the main power line and the 3.3V and 5V rails.

I do have a proper 3.3V across the line, including at the chip responsible for managing 3.3V/5V—same goes for the 5V rail. I haven’t tried to simulate a power-on yet, since the main issue still needs to be resolved.

I have full access to the boardview, but I’m not sure what to check next to isolate the problem.
...

Hello,

I’m an IT technician and I trained in electronic microsoldering. However, despite receiving excellent training in microsoldering, there was no module dedicated to electronic diagnostics, which is essential before replacing microcomponents.
I’m therefore self-training using everything I can find on the internet.