Appendix B: Maintenance and Service242
  5. Insert the battery holder into the calculator such that the exposed ends of the batteries are pointed toward the input/output ports.
  Insert holder
  6. Push the upper edge of the battery holder into the calculator until it goes no further. Then snap the lower edge of the holder into place.
  Push upper edge
If any of the batteries are inserted incorrectly, the calculator may not turn on. If, when you insert new batteries the calculator fails to turn on, immediately remove the battery holder and check the position of the batteries. The calculator cannot be damaged by inserting the batteries wrong; it simply will not function.
If the display blanks out, or the calculator will not respond to keystrokes, do the following:
  1. Ensure that the batteries are fresh, are properly installed, and that the battery contacts are not dirty.
  2. Turn the calculator off then back on. If the calculator does not respond. continue on to step 3.
  3. While holding the    key, turn the calculator on. This is a ‘‘master clear’’ and the entire calculator will be cleared. If the calculator does not respond, continue on to step 4.
  4. Remove the batteries and let the continuous memory in the calculator discharge over night. When you reinstall the batteries and turn the calculator on, if the display shows MEMORY LOST, you know that the calculator has been cleared.
  5. If the calculator still does not respond, service is required (refer to Limited One-Year Warranty).