Question about Texas Instruments TI-83 Plus Calculator
There maybe electrical shorts connecting the two motherboards, logic part and screen display part, or within the screen display part, causing the weird display when the calculator appears otherwise functional. Open the TI 83+ case following the U Of Washington posting on fixing TI 83+ problem on inability to communicate with TI link cable between calculator and computer. I used the plastic tools in an IPod battery replacement set to open the TI 83+ case as plastic tools will cause less damage to the TI case. Under the aluminun foil are the two motherboards, each a work of beauty. Good work TI. Connecting the two motherboards is a adhesive enbedded connectors sheet. Above that adhesive connector sheet was a different adhesive connectors sheet in the screen display part, which in my case, some of connectors were exposed. I wiped that adhesive connector sheet and the weird display disappeared with calculator functioning. I may buy some heat resistant clear adhesive tape to put over the exposed connectors part for insulation if problem occurs again. The above may or may not be helpful.
Posted on Mar 30, 2007
Please be prepared to re-install the calculator's OS if you run through this process.
If you have a straight Ti 83 without the Plus or, Silver Edition label goto (Procedure 2) below. If your Ti calculator is a Ti 83 Plus or better goto (Procedure 1).
(Procedure 1). Try a new set of AAA batteries. 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 [CLEAR] one more time to remove the message. 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. Try a new set of AAA batteries. Remove one of the AAA batteries. Press and hold the [ON] key for 20 seconds. Reinsert the AAA battery and then turn the calculator on.
(Procedure 2).
~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. If you could not install the new OS on your calculator goto step 4.
For a straight Ti 83 without the Plus or, Silver Edition label try the procedure below.
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