166 Appendix B: General Information
ERR:DIM MISMATCH Error
Your TI-84 Plus displays the ERR:DIM MISMATCH error if you are trying to
perform an operation that references one or more lists or matrices whose
dimensions do not match. For example, multiplying L1*L2, where
L1={1,2,3,4,5} and L2={1,2} produces an ERR:DIM MISMATCH error
because the number of elements in L1 and L2 do not match.
ERR:INVALID DIM Error
The ERR:INVALID DIM error message may occur if you are trying to graph
a function that does not involve the stat plot features. The error can be
corrected by turning off the stat plots. To turn the stat plots off, press
y, and then select 4:PlotsOff.
Contrast Feature
If the contrast setting is too dark (set to 9) or too dim (set to 0) the unit
may appear as if it is malfunctioning or turned off. To adjust the contrast,
press and release y, and then press and hold } or †.
TI-84 Plus Identification Code
Your graphing handheld has a unique identification (ID) code that you
should record and keep. You can use this 14 digit ID to register your
handheld at education.ti.com or identify your handheld in the event that
it is lost or stolen. A valid ID includes numbers 0 through 9 and the letters
A through F.
You can view the handheld’s Operating System, Product Number, ID, and
Certificate Revision Number from the About screen. To display the About
screen, press y L and then select 1:About.
Your unique product ID code: _____________________________