Texas Instruments TI-83 Plus Calculator "black square screen" Questions

Why is the screen on my TI-82 calculator so dark when I turn it on? It's a black square. How can I lighten the screen? Try Press 2nd key and release it Press and HOLD Down arrow to lighten.

...screen some how I got black squares along the bottom of my screen. One of them says "mat" they go all the way across the screen. I read in the hand book and it tells which each one is for ...

...black square. I've tried playing with the contrast button, but have had no luck. you can try 2nd than plus then 7 then 2 then 2 if you still scrambled screen its an electronic problem. i fix this ...

...black square on screen means what? The manual can be downloaded from here: http://college.cengage.com/mathematics/latorre/calculus_concepts/4e/assets/students/gcp/latorre_4e_grcalcguide.pdf First ...

...black square that is gridlike. No other controls work. All 5 batteries are new. How do I get it fixed. My location is Reseda California 91335 Try to lighten the screen reolution. Turn the calculator ...

...black squares along the screen. When I pulled out the battery's I noticed that the case was slightly ajar. As I rock it back and forth I can hear a rattling. It now will not turn on. buy ...

...black square ) is displayed, then either you have entered the maximum number of characters in a prompt, or memory is full.If memory is full: -Press 2nd then MEM and then 2 to display the MEMORY ...

black square )  is displayed, then either you have entered the maximum number of characters in a prompt, or memory is full.If memory is full: -Press 2nd then MEM and then 

...square in left corner and none of the buttons work when pushed. 2nd one has black blotches all over screen and again the buttons do not work when pushed. Hope you can help. Thanks Hi from your ...

...black square, but i can still see the cursor. please help. press 2nd, hold the down key until the screen lightens up. this doesnt work for mine Mine didn't work at first either (with panasonic ...