Question regarding boot ups ( tech in the making)

[khalas101]

So Im fairly experienced and have fixed many laptops but the one thing I still dont know how to fix is when notebook boot up with a black screen not related to the basic issues,

When I say basic issues, I mean, Ram, screen, battery, hdd etc. I realized this is fairly common with a lot of my older hp dv models that have nvdia graphic cards. Whats the solution to this?

Thanks

 

[Saga Lout]

Was the inverter one of your basics? Could it be as simple as pressing the Function key along with the key that can switch between the built-in screen and an external monitor?

I've also known it to be because the last user turned the brightness Function key all the way down inadvertently.

 

[Prostar Computer]

If the screen's backlight is on but you're getting no POST, then apart from troubleshooting "the basics," you might need to consider faulty firmware or a bad main board.

If there's no backlight, the computer could be POSTing and working [partially], but either there's no signal to the monitor (bad CPU or GPU, depending on the laptop's hardware configuration), or the monitor is defective.