Checksum Error; Other Errors - Texas Instruments TI-83 Plus Manual Book

Checksum Error

The Flash installer was not able to verify that the application was
fully installed. Exit the installer and try to install the application
again. If this problem persists, contact TI-Cares.

Other Errors

See pages B-6 through B-10 in the TI-83 Plus guidebook
education.ti.com/guides for information about the specific error
or contact TI-Cares.
Miscellaneous
Verify Maintenance Upgrade Version and Serial Number
1. Press y L .
2. Select .
1:ABOUT
The version number has the format . The serial number
x.yy
appears on the line beneath the product ID number.
Inequality Graphing for the TI-83 Plus Page 46