Make sure you have the batteries in correctly. You may want to put fresh ones in for these procedures to work. The batteries alternate
negative, positive, negative, positive. The first time I put my batteries in, I had one backwards and, it was hard to see that it was in backwards.
Make sure the IO ports at the top or,
button of the calculator are clean. You don't want a dirty connection missing the procedure up later on.
Please be prepared to re-install the calculator's OS if you run through this process.
Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds. Now, Pressing the [2nd] key followed by pressing and releasing the up arrow; repeat as necessary. Is the screen
showing any activity? If not continue the process.
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Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR],
reinsert the AAA battery and then turn the calculator on. The calculator should display the
message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message. If calculator did not display the message try pressing and releasing the [2nd] key followed by pressing and releasing the up arrow for one second. Goto step 2.
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Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display
"Waiting...Please install calculator software now". Follow the instructions for the
TI-83 family or TI-84 Plus family to reinstall the calculator operating system. If the calculator did not turn on connect the calculator to the computer and open Ti Connect. Next, open Device Explorer. Is the calculator asking to be installed? goto step 3.
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Steps to re-installing the operating system:
~Connect the TI Connectivity cable between the PC and the calculator.
~Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader
~Follow the on-screen directions to reinstall the calculator's OS. When or, if the calculator install the fresh OS goto step 4.
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Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.
If this process did not work for. Try re-doing the process and, extend the time by 5 minutes before you put all the batteries back in the calculator.