Why is my screen image cut off?

Why is my screen image cut off?

I have a TI-84 plus (not the silver edition) and the screen looks like it is slightly cut-off at the left edge. I compared it to another TI-84 and the portion of the screen that turns on appears to be short by about a millimeter, or a single column of pixels on the left hand side of the screen. It's not impossible to use, but it does make seeing some numbers kind of difficult. Anyone have any ideas how to fix this?