20 Most Recent Texas Instruments TI-86 Calculator - Page 6 Questions & Answers

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.

Use the ^ key, located just above the divide key. For example, to calculate two to the fourth power, press 2 ^ 4 ENTER

If the screen is black, try using the down-arrow instead of the up-arrow to lighten the screen.

The calculator will do this following digits. If you want it without the space, make the implied multiplication explicit by entering it as 5*x. Alternatively, you can arrow over to the space and delete it.

By the way, if you leave the space in there, exit the y= editor, then come back to it, you'll find that the space is gone.

Try adjusting the screen contrast. Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key to lighten or the up-arrow key to darken the screen.

If this doesn't do it, please reply to this post and we can try something else.

Pop all the batteries out then put them back in after 5 mins.

Try turning it on and then off several times.

Use the (-) key (just to the right of the decimal point key) instead of the - key to enter negative values.

Try adjusting the screen contrast. To lighten the screen, turn the calculator on, press and release the 2nd key, then press and hold the down-arrow key. To darken the screen, use the up-arrow key instead of the down-arrow.

Press the SIN key, type in the angle, and press ENTER. Make sure you have the proper angular mode set (degree or radian). To check (and change) the angular mode, press the MODE key and bring up the mode screen.

Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key for a couple of seconds until the screen lightens. If you go too far, repeat the process with the 2nd and up-arrow keys.

You can download the guidebook from the manufacturer's web site at
http://education.ti.com/calculators/downloads/US/Software/Download/en/6127/6447/86bookeng.pdf