Confirming calculator operation test, Confirming calculator operation test the self – HP 10B User Manual

Page 124

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The calculator doesn’t respond to keystrokes (nothing

happens when you press the keys):

Reset the calculator (sec step 1 above).

. Erase memory (sec step 2 above).

3« ir the calculator fails to respond after steps 1 and

remove the

batteries (page 119) and lightly press a coin against both calcu

lator battery contacts. Put the batteries back in and turn on the

calculator. It should display ALL CLr.

If steps 1 through 3 fail to restore calculator function^ the calculator

requires service.

The calculator responds to keystrokes but you suspect
that it is malfunctioning:

1. Do the self-test (described below). If the calculator fails the .self

test, it requires service.

2. If the calculator passes the self-test, it is likely that you’ve made

a mistake in operating the calculator. Try rereading portions of

the manual, and check “Answers to Common Questions” on

page 116.

3. Contact the Calculator Support department. The address and

phone number are listed on the inside back cover.

Confirming Calculator Operation

Test

the Self-

If the display can be turned on, but it appears that the calculator is not

operating properly, you can do a diagnostic self-test. To run the self-test:

First, hold down the (C) key, then press iPMTl at the same time.

2. Press any key four times, and watch the display as various patterns

are displayed. After pressing the key four times, the calculator

then the message 01. This indicates the calculator is ready for the

key test.

A: Assistance, Dattarios, and Service 121