Lenovo t420 screen replacement issues

Hey,
My screen cracked a couple weeks ago and i decided to order this screen from amazon:
http://www.amazon.com/LENOVO-THINKPAD-LAPTOP-SUBSTITUTE-REPLACEMENT/dp/B004VUO2N6/ref=sr_1_1?ie=UTF8...
I followed a video online with directions on how to replace the screen. Im sure I installed it right but when I turned the laptop on only the backlight lit and nothing else. Ive heard that It may be a problem with the screen cable but im not too sure. Any help on how I would fix this would be appreciated.
Solved!
Go to Solution.

There are 3 parts involved (motherboard, screen, cable) and there is not much you can be sure of without some replacement parts to try. I will say that USUALLY, if screen damage causes motherboard damage, the motherboard fuse blows. Since your backlight comes on, it is not the fuse. I have found that if the backlight comes on, in most cases, the cable isn't plugged in straight, either on the motherboard connector or, more likely, behind the panel. If you don't attach the connector to the panel with new tape, it can pull out from one side or the other. Also, the cable connector behind the panel is fragile and easy to damage. Finally, your new panel might be defective. Cable not plugged in right or damaged is probably most likely.

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