my laptop has a problem it turns on and evrything but the screen turns all dark and i cant see anything at all i trien going to properties and contropanel to make it brighter or change the contrast but it stays dark well not as dark but still dark so i still cant see anything at all

Firstly, confirm that all brightness levels (usually a keyboard function) are correct

Next plug in an external monitor, to confirm all software settings are correct
There may be a toggle function button, on your laptop to select external monitor
Or just start the laptop with the external monitor plugged in

If the external monitor works

Then you have a hardware fault with your LCD screen on your laptop
In most cases this is the Inverter board (electronic board in screen area)
You would need to dismantle the screen to locate this part
At which time, you could also check all internal connections

Note: This type of computer servicing requires an experienced person, who will need to follow all power and anti-static recommendations
You may also need to locate the dismantle guide for your laptop (if exists)