Texas Instruments TI-86 Calculator - Page 4 - Answered Questions & Fixed issues

The 86 has more memory. It also has some advanced calculus capabilities the 83 doesn't. However you're much more likely to see examples for the 83 in textbooks and other references.

TI-83:
http://www.ticalc.org/basics/calculators/ti-83.html

TI-83 Plus:
http://www.ticalc.org/basics/calculators/ti-83plus.html

TI-86:
http://www.ticalc.org/basics/calculators/ti-86.html

Turn the calculator on. Press and release the 2nd key, then press and hold the down-arrow key to lighten the screen. If you go too far, press and release the 2nd key then press and hold the up-arrow key.

Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key until the screen lightens. If you go too far, press and release the 2nd key and then press and hold the up-arrow key.

How to Change the Brightness of the Display

To darken the display, press the yellow 2nd button and then press and hold down the Up-Arrow button located in the upper right section of the keypad. Release the Up-Arrow button when the display has reached the desired level of darkness.

To lighten the display, press the yellow 2nd button and then press and hold down the Down-Arrow button. Release the Down-Arrow button when the display has reached the desired level of lightness.

As you go through this process, a number will appear at the top right corner of the display. If this number is 7 or higher when your screen reaches the desired level of brightness, then your batteries are getting low and may need replacing soon. This number will be approximately 3 or 4 for new batteries.

Having gone over a month without a response to my query, I assume my suggested screen adjustment solved the problem.

Having gone over a month without a response to my query, I assume my suggested display adjustment solved the problem.

Having gone over half a year without a response to my query, I assume my suggested contrast adjustment solved the problem.

Having gone over a month without a response to my query, I assume my suggested contrast adjustment solved the problem.

From the manual:
"Memory is insufficient to perform the desired command; you must delete items from memory before executing this command."

Either your arrays and/or lists are too big, or you have too much other stuff in memory for you to do this operation.

First, make sure you're pressing 2nd [MATH] F5 to get to the MATH MISC menu. To see additional items on the menu (in effect, to scroll through it) press the MORE key (just to the left of the left-arrow key), not the arrow keys.

Press 2nd Math -> More -> Stat -> DI ST -> More -> bipdf(

Try this, hook up new battery and go to MODE and darken and lighten the screen.. do it ten to fifteen times. if that doesn't help, try hook up most left and most right's battery terminal to a DC supply at 4.5V. dont go above 4.5 it will fry your calc (it is design to handle 3V). now you are forcing extra juice into the dead LCD screen lines... and reapeat the MODE + darken trick. I fixed mine like that! Works! and remeber to leave it completely black(darkest) for a while to keep that dead line alive!

To lighten the screen, turn the calculator on, press and release the 2nd key, then press and hold the down-arrow key. If you go too far, press and release the 2nd key then press the up-arrow key.

Having received no response in over five months, I assume the suggested contrast adjustment solved the problem.

Adjust the screen contrast. Turn the calculator on. Press and release the 2nd key, then press and hold the up-arrow key until the numbers darken. If you go too far, repeat the process with the 2nd and down-arrow keys.

Turn the calculator on. Press then release the 2ND key, then press and hold the down-arrow key until the screen lightens. If you go too far, use the 2ND and up-arrow keys to darken the screen.

The TI-86 does have a binary mode. To get it to this setting press [2nd] [mode] this will bring up several settings. Use the arrows to highlight "Bin" instead of "Dec" (these settings are the sixth row down) and press enter. Then press esc to exit the settings page. This will change you calculator to use binary rules.

Jill. She scored two standard deviations above the mean, while he only scored one-and-a-half standard deviations above the mean.

It sounds like the calculator is broken. Well broken past the point where you can fix it by yourself. You can try contacting TI about the warranty.