Old screen displays colored lines, new screen is black
My original iPhone 6 screen does not work. It only displays a few vertical lines, sometimes white and sometimes multi colored. When plugged into the computer the phone is recognized by iTunes but can't be accessed because of passcode. I tried a new screen (with no home button or camera) but that screen displays nothing. No lines or anything. The edges of the underside light up when I hit the sleep button so I'm assuming the screen is working. Any ideas what's going with it and how to get my computer to recognize the phone. When I put the old screen back on the lines show back up. Thanks
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