The second generation of the iPad with Wi-Fi, GSM and CDMA models. Some models were refreshed before the iPad 3. Repair is difficult and requires heat and prying. Released on March 11th, 2011. Model numbers: A1395, A1396, and A1397.
Sounds like you damaged your LCD. It sits below the digitizer glass, so even if the drop didn't damage the Digitizer glass, the LCD is still very fragil. It costs around $50.
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Could you elaborate on what the screen looks like? Are there vertical lines running across it? Would you be able to post a picture?
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