When i press most buttons it gives me the message ERR:MEMORY i cant access memory so i cant reset ram or delete . also i can not connect to my cpu it says TI-84 plus Silver Edition detected, but couldn't...
From the TI knowledge base and FAQ
How do I correct ERR: MEMORY on a TI-83 family or TI-84 Plus family graphing calculator?
An ERR: MEMORY
is given when there is not enough memory to perform the instruction or
function. To increase available memory by deleting the contents of any
variable (real or complex number, list, matrix, Y= variable, program,
Apps, AppVars, picture, graph database, or string), follow these steps.
• Press [2nd] [MEM] to display the MEMORY menu.
• Press 2: Mem Mgmt/Del.
• Select a variable or data that needs to be deleted and press [ENTER].
Use the arrow keys to move the cursor next to the item, and then press
[DEL]. The variable or data should now be deleted from the memory.
deleting programs or Apps, a message asking for confirmation will
appear. Select 2:Yes to continue. To leave any variable screen without
deleting anything, press [2nd] [MODE].
With the exemption of programs and Apps, no warning will be given to verify the deletion.Some system variables, such as the last-answer variable Ans and the statistical variable RegEQ, cannot be deleted.
Hope it helps.