I got a TI-89 Titanium about a year ago, and today I found that there was a black blob in the middle of the screen, which is there even when the screen is off.

Is there any way to fix this?

Thanks,
Rohan
I'm not super experienced with this, but it sounds like a pen mark or something similar, especially since it is there when the screen is off.
It's not fixable. The LCD is damaged, probably due to pressure from being in a backpack.
  
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