Screen problem on HP EliteBook

i have old HP Elitebook 8560p laptop that have problem with showing image on laptop screen. When i connect laptop to external monitor it's working. I tried to update, delete old graphics card drivers but sometimes i get image on my laptop LCD and most of the time i don't get the image(only on external monitor). So my question is, if i need to replace LCD screen, display cable or there is problem with graphics card on the motherboard?
Once i got stripes on my LCD and after that laptop restarts saying that he run on some problems, something about VIDEO error.
What do you suggest to me? Is this hardware problem or something about the software?

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Re: screen problem.

It surely is a hardware problem. If changing the cable and the screen don't help, it's the motherboard and that most often is quite expensive to replace.
If you feel it's software, go back to factory conditons.

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That's the problem

That's the problem. LCD and display cable also are expensive(LCD is more than 60 dollars).
I know that motherboard is expensive.

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No. 60 dollars for a laptop screen is CHEAP!

You seem to be new to laptop repair. Not long ago they were in the hundreds of USD.

My brother and I picked up many HP Probooks from Groupon so let's see what those run there:
441USD at

So my bet is motherboard could run about half that so repair of this old i7 based laptop is cheaper than a new laptop. shows this may be the cheapest i7 laptop around.

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