How to Reset a TI-84 Plus CE — RAM, Defaults & Full Reset

"Reset your calculator" can mean three very different things on a TI-84 Plus CE, and picking the wrong one can wipe programs you wanted to keep. This guide walks through all three levels — Defaults, All RAM, and a full All Memory reset — and shows you how to protect your programs first. Every option lives in the same menu, so once you know the map, any reset takes under a minute.

The three reset levels at a glance

All resets start the same way: press 2nd + (MEM) to open the MEMORY menu, then choose 7: Reset. The RESET screen has three submenus across the top — RAM, ARCHIVE, and ALL — and each one goes a level deeper than the last.

Reset	What it deletes	What it keeps
Defaults	Nothing — only restores mode and system settings to factory values	All programs, lists, variables, apps, and archive
All RAM	Unarchived programs, lists, variables, and everything else in RAM	Archived items, apps, and the OS
All Memory	Everything in RAM and archive, including all apps	Only the OS itself

There's also an ARCHIVE submenu in between (1: Vars, 2: Apps, 3: Both) if you ever need to clear archived items without touching RAM, but the three levels above cover almost every real situation.

Before you reset: archive your programs

A RAM clear deletes any program stored in RAM, but it does not touch the archive. So before clearing RAM, move the programs you care about into archive:

Press 2nd + (MEM) and choose 2: Mem Management/Delete….
Choose 7: Prgm… to list your programs.
Move the cursor to a program and press ENTER. An asterisk (*) appears next to the name — that program is now archived and safe from a RAM clear.
Repeat for every program you want to keep. Pressing ENTER again removes the asterisk and unarchives it.

Archived programs survive 1: All RAM completely. They do not survive an All Memory reset, so if you're doing a full wipe, back up to a computer first (see /guides/update-os-ti84/ for how to connect with TI Connect CE).

Level 1: Reset Defaults — the "calculator is acting weird" fix

If graphs look wrong, answers come out in the wrong format, or the mode settings are a mess, you usually don't need to delete anything. Restore the default settings:

Press 2nd + (MEM), choose 7: Reset.
Under the RAM submenu, choose 2: Defaults.
Choose 2: Reset to confirm.

This restores Mode, Graph Format, Table Setup, and other system settings to factory values without deleting any user data, programs, or apps. It's the safest reset and the right first move whenever the calculator just behaves strangely.

Level 2: Clear All RAM — the "teacher says clear it" reset

Press 2nd + (MEM), choose 7: Reset.
Under the RAM submenu, choose 1: All RAM.
On the confirmation screen, choose 2: Reset. The calculator displays "RAM Cleared".

Lists, unarchived programs, and stored variables are gone; archived items and apps stay. Two side effects to expect afterward: the home screen is empty, and any list you deleted will trigger ERR:UNDEFINED the next time something references it — see /error-fixes/err-undefined/ for why lists "disappearing" after a RAM clear causes exactly that error. If your goal is just to free up space rather than wipe everything, deleting items one at a time is gentler — see /guides/clear-memory-ti84/.

Level 3: All Memory — the "selling it or starting over" reset

Press 2nd + (MEM), choose 7: Reset.
Press ▶ ▶ to reach the ALL submenu and choose 1: All Memory.
Choose 2: Reset. The calculator displays "MEM Cleared".

This permanently deletes everything from RAM and archive — including all apps — leaving only the operating system. Use it when you're selling or handing off the calculator, or when a full clean slate is genuinely required. TI recommends backing up with TI Connect CE software before doing this, because there's no undo.

Which reset should you use?

Settings feel off, graphs misbehave → 2: Defaults. Deletes nothing.
Teacher requires a cleared calculator → archive your programs, then 1: All RAM. (Many schools use Press-to-Test mode instead — details in /guides/clear-memory-ti84/.)
Selling it, or something is deeply broken → 1: All Memory after a backup.

If your calculator is stuck on a "Validating OS" screen rather than just misbehaving, that's an OS problem, not a memory problem — see /error-fixes/validating-os/ instead.

Practice right now

Not sure which reset you need, or don't want to experiment on your real calculator before a test? Try the whole flow on the free online TI-84 calculator — it's a full TI-84 Plus CE in your browser. Press 2nd +, choose 7: Reset, and click through the RAM, ARCHIVE, and ALL submenus. Nothing you wipe there costs you anything, and you'll know exactly what to press when it counts.