How to Clear RAM on TI-84 Plus CE Step 1 Open the "MEM" Menu. MEM is the second function of the plus sign, so push 2nd, then the plus sign. ... Step 2 Arrow down to "Reset..." and press "Enter" ... Step 3 Press "Enter" ... Step 4 Arrow down to "Reset" and press "Enter" ... Step 5 Press "Clear" to use your calculator normally again.