Laptop screen not working

[RRoyale]

I have a HP 15-1010wm laptop and it powers on, with keyboard lights and everything, but the screen stays black, even the backlight. I have hooked it up too a external monitor and it says no signal, any help?

 

[webworkings]

Lets make sure you hooked it up to the external correctly. The instructions are below. Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.