Laptop does not turn on but some LEDs light

Hello.

My low-end ZedAir laptop (it has non-removable battery) does not turn on and been trying to turn it on by the power button for hours.

I can’t figure out the real cause or factor that caused it unusable.

Maybe it is caused by the broken power button, or maybe the battery or maybe even the OS because I was able to open it before with the same issue, and LEDs are lighting up for 1 second after it was plugged in. Please help me!

Any help will be appreciated. Thank you!