Texas Instruments TI-84 Plus CE Getting Started page 70

c) Select OK when you see the Reset Verification Screen. The calculator
is now "clean."
2. Re-enable files to turn off test mode.
a) Link two TI-84 Plus CE graphing calculators using a unit-to-unit USB
cable.
b) Send a file to bring the calculator(s) out of test mode.
66 Using Press-to-Test