Lenovo T430 with power issue need help

[manuel.it.solution]

Please a customer brought this Lenovo T430 laptop with power issue.
When you press the power switch the yellow led indicates the power is on and fan spins for 10 seconds and goes off with no display or stable power.

Please can someone help me on what to check first?
Thanks in advance

[SMDFlea]

Re: Lenovo T430 with power issue need help

Post voltage measuments on all large grey coils

Beginner's guidelines https://www.badcaps.net/forum/showthread.php?t=88758

Laptop battery charging circuit https://www.badcaps.net/forum/showthread.php?t=90356