Solved! Lenovo ThinkPad edge 13 don't Start

Dec 26, 2018
I have a broken Lenovo ThinkPad edge 13. It does not want to start anymore when I press the power head.

There is no fan running or anything else. However, the red LED of the logo lights up. I have already checked the battery and power supply. Also the fuse from the motherboard. Also, I have already done a BIOS reset, this had no success.

I think it's on the motherboard. I would like to try to fix it. Maybe you have a suggestion which component could be defective. Or does anyone know where I get a wiring diagram.

Then I would take measurements myself.

Thank you for your help. :)
There is no good way to know which component is bad, wiring diagram would be from Lenovo Support but it's not likely they will provide you one. Motherboards are complex, it's not like repairing a 1980s radio.