Laptop, 4 month old, black screen

Hi
My Hp 14-n047ca, Win 8, 64 bit, 8 Gb ram has a black screen.
The power button and wireless button are lit. The keyboard is not back lighted.
I have taken out the ram and placed in the other slot. When I was doing this, this wire came off but it looks like it just pops back on
I have removed battery, power cord, held power button for 60 seconds, placed battery back in and then power cord, and powered on. The blue HP screen was appearing but I just noticed that it isnt appearing when the power button is turned on.
I also did the previous step without the battery.
Here is a photo www3.telus.net/m1000/laptop.jpg
1. connector attached
2. one side of the connector
3. other side of the connector
4. the wirees back in place after I took photos 3 & 4
I would appreciate any help with my '4 motnh old' ;-)
Thank you
Mark
link to product: http://www8.hp.com/ca/en/products/laptops/product-detail.html?oid=6424866#!tab=features

I think the wire that came off is the wireless card. Your laptop is only 4 months old so you still have 8 months of warranty left. I would request service.
http://h10025.www1.hp.com/ewfrf/wc/contacthp?cc=us&dlc=en&lc=en&product=6550351&task=
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As per the query we understood that you are facing issue with black screen in your Lenovo G510 laptop.
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Remove the battery and connect only adapter and check for the issue also connect only battery and check for the issue.
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