I am always happy to polish the apple...before I eat it. (Just joking!)
All the applications that were preloaded on your calculators are available to download freely from http://education.ti.com
Use the tab Download--> Apps and software. Then select software for
the TI83/TI84 Family. While you are at the site download the TI
Connect, if you do not have it already. The link follows.http://education.ti.com/educationportal/sites/US/productDetail/us_ti_connect.html
You can also download the latest OS there. (Beware: while applications and programs are compatible with the TI83 and 84, the Operating systems are not.)
Install TI connect on your computer and run it to open the main Window.Then connect
you calculator to a USB port and, in the TIConnect main window Click
the TIDeviceInfo icon. Software will try to retrieve the info. If it
does your calculator is ready to communicate with the computer.
it tells you Device Not found , Click communication settings in same
pop up window where it said Not found, and Select Device, Select Cable
(USB or TIsilver cable), Select Port (USB1) and Click OK..
you are lucky and it works, you can reinstall the OS, which can be
downloaded from education.ti.com. You drag and drop the OS on the
TIconnect main window. Calculator must of course be connected to computer.
To install an application already downloaded to your computer, drag it
to the main window of TI Connect and drop it. Keep installing, the
appilcations you want.
If you have problem with TIconnect, use
the calc-to-calc cable to transfer the Apps from a working calculator.
You should be on Receive mode [2nd][Link] --->>Receive. (When
both calculators are ready hit enter.) The other calculator must be set to Send [2nd][Link][SEND][C:Apps]. A
list of Apps appears. Scroll down the list. If you want to transmit un
app you press [ENTER] when the arrow reaches its line. Once an app is
selected , a small square appears on the left. After the selection, Hit
transmit. I suggest you transfer Apps, one after the other. Avoid
selecting them all and send them all at one go.
If you want to transfer the OS of a working calculator the sending calculator must be on [2nd][Link][SEND][SendOS]. TI83Plus OS is not compatible with TI84Plus nor TI84PLUS Silver edition OS.
In addition to the preloaded applications, you can also transfer programs the same way. For a repository of TI83PLUS/TI84PLUS and TI84+ SE, go to www.ticalc.org (or com), visit the archive section of the site.
Hope it helps.