They both need batteries and that may be all that is keeping them from turning on.
eBay
Item is preowned in good condition coming with minor wear from use as shown. Comes with the calculator itself and cover only and is tested working!
eBay
It runs on batteries, making it easy to take with you wherever you go.
eBay
Found this in some box from college. A few pixels appear to have gone, but definitely still usable for anyone in need of a cheap calculator for school. I will leave the recipient to peel off the stickers on the cover 😆.
eBay
eBay
eBay
eBay
The Texas Instruments TI-83 Handheld Graphing Calculator is a versatile tool perfect for students and professionals alike. With its regular-sized key and display, this calculator offers basic, financial, and graphing capabilities. Powered by batteries, it is convenient for use on-the-go. The LCD display and programmable features make it a reliable choice for complex calculations and data analysis. The TI-83 model by Texas Instruments is a popular choice for those in need of a handheld graphing calculator.
eBay
Tested and working. Has a few small dark spots on the screen. Doesn’t affect functionality.
eBay
Around The Office makes quality tested ink products for all makes and types of office machines. Designed to fit your calculator by Around The Office.
eBay
EL SWT1701. EL SWT1701 SWITCH, ROCKER, 125-250V 10.1A. This is a genuine OEM parts from.
eBay
This Texas Instruments Scientific Graphing Mathematics Calculator is a handheld device that is perfect for on-the-go calculations. With a regular sized display and regular sized keys, this calculator is designed for ease of use. It runs on battery power and is ideal for business and industrial purposes, as well as for use in office equipment. The calculator comes with a protective case to keep it safe and secure when not in use.
eBay
Texas Instruments TI-30X II S (Good) & KENKO-FX-82 LB Calculator-Needs Battery
eBay
12-Digit Extra Large Display: Large LCD screen ensures clear visibility and reduces eye strain during intensive tasks. TheCasio MC-12M is a highly practical mini desk-type calculator designed for professionals who need an extra-large display in a compact form factor.
eBay
Large LCD clearly shows each digit to help prevent reading errors.
eBay
The Texas Instruments TI-83 Plus Graphing Calculator is a handheld device powered by batteries, featuring a regular-sized display and key. Made by Texas Instruments in China, this graphing calculator is ideal for mathematical calculations and graphing functions in various educational and business settings. With its reliable performance and compact design, this calculator is a convenient tool for solving complex equations and analyzing data. It comes with a cover for added protection when not in use.
eBay