Notebook does not start

[Stealee]

Before and After servicing the laptop, everything worked, at the moment after startup, the screen is black and only 2 indicators are lit: charge and power on

[WAWood]

If this was serviced an an HP Service Center, you need to contact them and tell them about the current issues -- so they can look at it again.

But if this was serviced elsewhere, and the warranty was still in place, that violated the warranty and NOW, HP will not service it.  So, you would have to find somewhere else to get it serviced.