Display driver has crashed now my laptop's built in monitor has no display but works on external monitor but only on safe mode

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While watching videos from youtube (pdf files were also opened during that time but minimized)
I encountered a message that says "display driver has crashed and successfully recovered" that message showed up for three times the interval was like 10 seconds. After the third time the blue screen showed up and my laptop turned off.

When I try to turn on my laptop there is no more display. I then connect it to an external monitor through the VGA port it works fine but only works on safe mode.When I try to choose start normally it goes to startup repair after that it says Startup Repair cannot repair this computer automatically. My graphics card is AMD radeon. Please help me repair my laptop.

EDIT: Disabled my AMD radeon HD 6470M graphics and turn to VGA standard graphics instead. Now my laptop starts normally but displays only on external monitor laptop's built in LCD has no display.

EDIT: When AMD radeon graphics is selected. Monitor Icon is missing in device manager
 
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I inserted the windows disk still on safe mode

 
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i've tried it but didn't solved the problem. I've disabled my AMD radeon HD 6470M graphics and turn to VGA standard graphics instead. Now my laptop starts normally but displays only on external monitor, my laptop's built in LCD still has no display. I think my graphics card and my laptop's LCD might be the problem.
 
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goku1234567890

goku1234567890

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Did your laptop fall from some height or did it LCD has been damaged? Try taking it to repair shop because if it can give display on external monitor than the problem is with the laptop LCD.
Edit: Also check your graphic card too it too may have been damaged due to overheating or some other way.
 
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No, it has never been damaged. Before this problem occur i was watching a video and then this message showed up "display driver has crashed and successfully recovered" it showed up three times and after the third time BSOD showed up!

How do i know if I graphic card have been damage?
 
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goku1234567890

goku1234567890

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First of all I would recommend taking it to repair shop, you can also remove the back panel of laptop and check the graphic card for signs of wear or damage. Remove it if you can and insert it properly. Did your laptop was on high performance when you were watching video?
 
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No.. I did not change any setting nor installed/deleted any program a month before this problem occur.
 
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