Why won’t a real TI-83 Plus turn on?
Two things account for most “dead” TI-83 Plus calculators. First, the contrast may be turned all the way down: press and release 2nd, then hold ▲ for several seconds and watch for the contrast number in the corner. Second, the backup coin cell (CR1616) sits beside the AAA batteries; when it fails the calculator can refuse to boot or repeatedly show “RAM Cleared”.
If it froze during a program, remove one AAA battery and the coin cell, hold ON for about 30 seconds to drain the capacitors, then put the batteries back. To clear memory before a test, follow our reset guide — the keystrokes are the same on the TI-83 Plus.
Classic syntax: watch your parentheses
The TI-83 Plus writes everything on one line, so grouping matters. 1/2X is read as (1/2)·X; if you mean 1/(2X) you must type the parentheses. Use the (-) key for a negative number and - only for subtraction — mixing them up is the usual cause of ERR: SYNTAX.
TI-83 Plus vs TI-84 Plus CE
| Feature | TI-83 Plus | TI-84 Plus CE |
|---|---|---|
| Screen | 96×64 monochrome, no backlight | 320×240 colour, backlit |
| Processor | 6 MHz Z80 | 48 MHz eZ80 |
| Entry style | Classic linear | MathPrint (stacked fractions) |
| Power | 4 AAA batteries + CR1616 backup | Rechargeable battery, charges over USB |
| Exams | Both are accepted on the SAT, PSAT, ACT and AP; check your board’s current list | |
A full breakdown lives in our TI-84 vs TI-83 comparison.