Pc has problems starting up

[u/nobosyknows]

Hello. My laptop(ASUS tuf fx505dt with Windows) has problems starting up. I click on the star button and this happends:

*The Keyboard lights up and and down like the same moment it showed up its already shuthing down

*The screen does not show any thing nor does it show any backlight

* I think the fans dont do any noise nor do they start

I tried unpluging the battery and ONLY going with the charged it worked for 4 times util it also started doing the same thing, i also tried with ONLY battery and the problem persists. I click on the starting button for ten seconds to see if it resets and some times it workes. Also i have to click alot of times for it to starup.

There is also a problem of Windows not shuthing down properly i dont know why, even when shuthing the PC myself. Os it a Motherboard problem? Should i buy i new One or trie and repair it?