Support My nexus 7 doesn´t work and I don´t know why :S

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http://androidforums.com – About a few weeks ago my nexus 7 fell from the desk to my legs while charging causing a damage on the cable, after that I started to use other usb chargers like my blackberry one and the Nexus just started to get charged slower than before. After a couple of weeks the nexus was completly discharged, when I tried to charge it again using the blackberry charger it started to show this weird lines on the screen and until now I don´t know what happened. Please help. (General)