One day I loaned my calculator to a friend for a day, and when he gave it back, the contrast was all weird. Like, when I put it at maximum darkness, it was only somewhat gray. Then, horizontal rows of pixels started disappearing, meaning that they wouldn't turn on in most cases, eventually turning off probably twenty lines in the upper half of the screen only. However, if I put on the graphing window, the line in the center would be whole, but the pixels would be blue and wouldn't turn off even if I put it to minimum contrast.
So, I tried to fix this by taking apart the calculator. I took the black tape off the top of the hard drive (just opposite of the screen) and rubbed the lines with an eraser. Now it doesn't even turn on. I hooked it up to my computer and found I could still view the programs inside using TI-Connect, but the screen doesn't work. Can anyone help?