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al4629740Flag for United States of America

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vertical lines on laptop

I have a Dell Vostro 3700.  I have vertical white lines intermittently on the screen.  When I connect an external monitor, it shows up ok.  

Is there a loose cable or is there a bad monitor or inverter in this thing?
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I have seen this go in and out.  Sometimes it looks great.  Does that mean it could be a cable?  The lines are present from the beginning when I turn the computer on also
I am out of warranty.  The laptop is not that old
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ive opened the laptop before and did absolutely nothing other than "poke around"

It fixed it temporarily and then it came back.
do you have removal instructions for a vostro 3700 monitor?
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HomerTNachoCheese

I replaced just the screen before from some place like laptopscreens.com or the like - you do have to be careful.  The inverter cable that the new screen came with was too short, and it did not have as many mounting points as the original.  It is risky getting generic replacements, but if you can find no other alternative, it may be worth the risk to save a lot.