Casio Fx 991Es Plus Battery Replacement Repair Guide

Difficulty

Easy

Steps

Time Required

                          3 - 5 minutes

Sections

Battery
7 steps

Flags

BackCasio FX-991ES Plus
Full Screen
Options
History
Save to Favorites
Download PDF
Edit
Translate
Get Shareable Link
Embed This Guide
Notify Me of Changes
Stop Notifications

Introduction

What you need

Step 1

              Battery

Make sure the calculator is off. If not, turn it off by pressing the [Shift] button then the [AC] [OFF] button.

Make sure the calculator is off. If not, turn it off by pressing the [Shift] button then the [AC] [OFF] button.

1024

Step 2

Flip the calculator upside down and lay it on a flat surface.
Do not press hard on the calculator to avoid turning it on by mistake.

Flip the calculator upside down and lay it on a flat surface.

Do not press hard on the calculator to avoid turning it on by mistake.

Step 3

Use a Phillips #0 screwdriver to unscrew the 1.6 mm screw on the battery cover.
Remove the battery cover.
Be gentle while unscrewing the cover, to avoid damaging it.

Use a Phillips #0 screwdriver to unscrew the 1.6 mm screw on the battery cover.

Remove the battery cover.

Be gentle while unscrewing the cover, to avoid damaging it.

Step 4

Use a spudger to remove the old battery. Insert it in the empty slot to pry out the battery.
Do not use a sharp item like a knife.
Do not use metal tools, to avoid damaging parts of the battery compartment.

Use a spudger to remove the old battery. Insert it in the empty slot to pry out the battery.

Do not use a sharp item like a knife.

Do not use metal tools, to avoid damaging parts of the battery compartment.

Step 5

Place the new battery into the compartment with the positive (+) side facing upwards.

Place the new battery into the compartment with the positive (+) side facing upwards.

Step 6

Attach the battery cover and tighten the screw with a Phillips #0 screwdriver.

Attach the battery cover and tighten the screw with a Phillips #0 screwdriver.

Step 7

To reset the calculator, press the [ON] button.
Press the [SHIFT] button.
Press the [9] [CLR] button to clear the data.
Press the [3] button to choose “ALL”.
Press the [=] button to agree.
Press the [AC] button

To reset the calculator, press the [ON] button.

Press the [SHIFT] button.

Press the [9] [CLR] button to clear the data.

Press the [3] button to choose “ALL”.

Press the [=] button to agree.

Press the [AC] button

Cancel: I did not complete this guide.

                                                                                      6 other people completed this guide.

Author

                                      with 2 other contributors

                    Zinab Alhamoud

Member since: 01/17/2021

334 Reputation

                                      1 Guide authored                  



                       Badges:
                       8







                                                        +5 more badges

Team

                       York University, Team S1-G4, O'Regan Winter 2021                        

                                                  Member of York University, Team S1-G4, O'Regan Winter 2021 



                    YORK-O'REGAN-W21S1G4                     


                                            1 Member                     


                                            5 Guides authored

Igor Diniz - Oct 20, 2022

Thank you so much! God bless you.

Introduction#

What you need#

Team#

Introduction

What you need

Team