HP HP-28S User Manual

Assistance, Batteries, and
Service
A
This appendix contains information to help you when you have prob-
lems with your calculator. If you have problems understanding how
to use the calculator, and you can't find an appropriate topic in the
Table of Contents (page 5) or the Subject Index (page 332), see U An-
swers to
Common Questions" below. If you don't find an answer to
your question, you
can contact our Calculator Support department,
using the address or phone number listed on the inside back cover.
If you need to replace the batteries, see page 286. If your calculator
doesn't seem to work properly, see "Determining If the Calculator Re-
quires Service"
on page 289. If the calculator does require service, see
"Limited One-Year Warranty"
on page 291 and "If the Calculator Re-
quires Service"
on page 293.
Answers to Common Questions
Q: The calculator doesn't turn on when I press ION I. What is wrong?
A: There may be a simple problem that you can solve immediately, or
the calculator may require service. See "Determining If the Calculator
Requires Service"
on page 289.
Q: How can I verify that the calculator is operating properly?
A: Perform the repeating test, as described on page 290.
Q: How do I clear everything from the calculator's memory?
A: Press and hold I ON I[]§J[EJ, then release, as described in "Clearing
All Memory (Memory Reset)"
on page 20.
282 A: Assistance, Batteries, and Service

HP HP-28S Specifications

General

Brand	HP
Model	HP-28S
Category	Calculator
Language	English