Appendix F: Battery, Warranty, and Service Information 261Verifying Proper Operation (Self-Tests)

If it appears that the calculator will not turn on or otherwise is not operating properly, use one of the following procedures.

For a calculator that does not respond to keystrokes:

1.Insert a thin, pointed object all the way into the reset hole near the battery compartment and then remove it.

2.The display will show Pr Error. Pressing any key will clear this message from the display.

3.If the calculator still does not respond to keystrokes, remove and reinsert the battery. Make sure that the battery is properly positioned in the battery compartment.

4.If the calculator does not turn on, install a fresh battery. If there is still no response, the calculator requires service.

For a calculator that does respond to keystrokes:1.With the calculator off, hold down the ;key and press §.

2.Release the ;key, then release the §key. This initiates a complete test of the calculator’s electronic circuitry. If everything is working correctly, within about 25 seconds (during which the word running flashes) the display should show –8,8,8,8,8,8,8,8,8,8, and all of the status indicators (except

the battery power indicator) should turn on.* If the display shows Error 9, goes blank, or otherwise does not show the proper result, the calculator requires service.

*The status indicators turned on at the end of this test include some that normally are not displayed on the hp 12c platinum.

If the calculator displays Error 9 as a result of the ;/µ test or the ;/+test but you wish to continue using your calculator, you should reset Continuous Memory as described on page 86.

File name: hp 12c pt_user's guide_English_HDPMF123E27

Page: 261 of 275

Printed Date: 2005/8/1

Dimension: 14.8 cm x 21 cm