When I turn my laptop on, the screen turns White then black then White again with coloured lines running down vertically, I can't see anything running on my screen

Could be a lose cable, Check the cables connecting to the monitor (screen) and the to PC.

Also, made sure your phone or any other electronic device(s) aren't in close proximity to the screen. They sometimes cause interference.

Somebody dropped it

take out the battery, then take out the memory. Put one of the two memory modules back in, and turn it on. If everything looks ok, shut down and put the other one back and try again...if everything is ok...then ok. If it doesn't work after the first one, let me know...

The video card (built-in on the motherboard) maybe faulty or the LCD screen is faulty.
Connect an external monitor to the video port of your laptop, power up the monitor first then boot up your laptop. If the video card id OK then the laptop will automatically divert the video to the external monitor. Then the problem is a faulty LCD screen.
If the external monitor also displays black vertical lines then you have a faulty video card and since it is part of the motherboard it is impossible to fix.

Hi there, most likely there is a problem with either the GPU of your laptop.
The only other troubleshooting step you can try is to open the laptop up and reseat the connector of the LCD to the motherboard where your GPU is integrated.
You may also want to try an external monitor and if nothing is displayed or the same screen is displayed then the GPU of your laptop is fried and it needs to be replaced.
Hope this helps!

This is beyond consumer ability to repair. Please have it looked at by a qualified electronics service company.

remove the battery and on power AGAIN, if still cant u have to give any1 tech is a motherboard problem,

lining with colouring do u kne how to open lcd panel, open panle carefully and clean the inventer nicely and put it again,
normall this stype of preb need to Repair wiht the blowrmachines or ,,,,,,,,,,,,,,,

normally the 19" resolution can support up to 1280*1024, but if it comes with vertical lines in full screen, it might indicate the panel is no longer to work and probably it's time to replace new one.

Yeah, I have this exact same problem, except my mom slammed my laptop shut in frustration around half an hour ago, so that's why it's like this. The right half of my screen is black with two colorful stripes (mostly white), but the left half is visible. I've researched a bit and found out that this is because the LCD in your monitor has burnt out, and since you don't have a monitor to attach, the only thing you can do is to go to where you bought the laptop and either get it fixed for free or return it for a brand new one (if your warranty still stands). If not, you might as well get a new laptop. I think my warranty has expired, so I'll get a new laptop, hopefully.

Hope this helps!

~Sam.

check the video cable and see if it;s properly seated. run the laptop with something that uses memory. if the video chip it going to show signs of problems, it will be more prominent when the laptop gets hot. most cases laptop motherboards have integrated video cards and cannot be replaced.