HP HP-16C User Manual

106 Appendix C: Battery, Warranty, and Service Information
Verifying Proper Operation (Self-Tests)
If it appears that the calculator will not turn on or otherwise is not
operating properly, review the following steps.
For a calculator that does not respond to keystrokes:
1. Press the [D] and keys simultaneously, then release
them. This will alter the contents of the X-register, so clear
the X-register afterward.
2. If the calculator still does not respond to keystrokes, remove
and reinsert the batteries. Make sure the batteries are
properly positioned in the compartment.
3. If the calculator still does not respond to keystrokes, leave
the batteries in the compartment and short the battery
terminals together. (The batteries must remain in place to
prevent possible internal damage to the calculator.) With
a paper clip or a piece of wire, briefly connect the termi-
nals. Only momentary contact is required. The terminals
are matching metal strips, or a combination of one spring
and one hard edged tab located at either end of the battery
compartment. After you do this, the contents of Continu-
ous Memory will be lost, and you may need to press the
key more than once to turn the calculator back on.
4. Ifthe calculator still does not turn on, install fresh batteries.
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 [x].
2. Release the key, then release the [x] key. This initiates a
complete test of the calculator’s electronic circuitry. If
everything is working correctly, within about 15 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 * low-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-16C.
T 1f the calculator displays Error 9 as a result of the [ON]/[x] test or the [ON]/[+] test, but
you wish to continue using your calculator, you should reset Continuous Memory as
described on page 20.

HP HP-16C Specifications

General

Brand	HP
Model	HP-16C
Category	Desktop
Language	English