Sharp EL-9900 - Manual (Page 242)

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Appendix
The screen images cannot be stored (SLIDE SHOW)
• The available memory may be too small to store the screen
image. Select “B MEMCHK” under @ p menu. Select
and delete unnecessary items under “C DEL”.
There appears to be no functions available for integral/differential calculations!
• Make sure that the Advanced mode is selected. The integral/
differential calculation tools can be found in the M menu.
• Access CATALOG menu by pressing @ j.
The calculator is not responding; the software appears to have crashed!
• Press O. If this does not work, then press @, then
O to tell the running application to quit.
If everything fails, then the calculator’s memory may need to be
reset. Resetting the calculator’s memory will clear all the stored
information, such as programs, lists, and variables.
To reset the unit’s memory, open and close the battery compart-
ment cover, and press O to open the verification window. To
prevent data loss, try O first. If it does not work, repeat the
reset operation and press C when prompted.