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The most likely cause is that the batteries are depleted, the main ones and the backup battery. Replace with fresh ones. In so doing you may have to readjust contrast.
To adjust the contrast. Press [2nd] key and release it. Press and Hold the UPArrow to increase contrast or DownArrow to lighten the screen.
In the message you reported, I notice that your OS is old. The latest version is the 1.19. You might see fit to update the OS. You can use the TIConnect software, downloadable from education.ti.com.
Install the TI Connect on your computer. Connect the calculator to the computer (after you install TI Connect) with th TI USB Silverlink Cable. Run TI Connect and if you are connected to the Internet, click the Updates button in TI Connect.
You used TIConnect to reinstall the OS. There are three ways you can put programs or apps in your calculator.
1. USB calc-to- computer cable.
2. TI Silver Cable calc-to computer.
3. calculator to calculato cable.
Try whichever calculator to computer link method you did not use,
As a last resort use the calc-to-calc connection to a working calculator
Yours must be on [2nd][Link] -->[Receive] Hit enter when both calculators are ready.
The other TI84 must be on [2nd][Link] Send [G:SendOS]
Hope it helps.
PS. I checked in The Webster Third New International Dictionary ( about half a million entries), and no wig, wig, whig, whig out meaning that would be appropriate to the present context. Could you enlighten me as to where this idiom is used. Much obliged.
That means that you know your calc crashed. This can be caused by taking out the batteries durring running time, happened just randomly. Well nothing to fear just press clear and it should go away but if it stays on that screen you have problems and is best to try some of these methods. Take out all the bateries and press and hold the on button for 30 seconds. Put the batteries back in and it should have reset. Warning you should archive everything incase this happens. To archive go to 2nd mem and hit enter to put a astrick next to the app (meaning archived)
Sounds like a possible short to me, But I don't have experience with that cause I have yet to test my calc with water if you know what I mean... The one thing that I can suggest is trying to connect with another persons calc and try the "send OS" command to see if that will reset your calc to a working state. Sorry to hear about the damage though.
TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.
You can try to put fresh Back-Up batteries into the calculator. If not, you can always call the customer support at Texas Instruments to see if you can get a replacement part for your calculator. This may resolve the problem you are currently having. Hope this helps.