Chosen Solution

I can not turn on the computer.

Replacing a power supply is one of the easier things to do . https://www.youtube.com/watch?v=bXGgK-Fp… This will help in choosing a power supply https://www.youtube.com/watch?v=lXku-gsd… Although its not your brand here is a guide from ifixit that might give you a general idea of what to do Lenovo IdeaCentre K410 Power Supply Unit Replacement Hope this helps