ASUS X421EQ Portable Laptop User Guide
- June 4, 2024
- Asus
Table of Contents
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ASUS X421EQ Portable Laptop
COPYRIGHT
INFORMATION
No part of this manual, including the products and software described in it,
may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language in any form or by any means, except documentation
kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF
PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND
THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
Products and corporate names appearing in this manual may or may not be
registered trademarks or copyrights of their respective companies, and are
used only for identification or explanation and to the owners’ benefit,
without intent to infringe.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN
THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT. Copyright ©
2020 ASUSTeK COMPUTER INC. All Rights Reserved.
LIMITATION OF LIABILITY
Circumstances may arise where because of a default on ASUS’ part or other
liability, you are entitled to recover damages from ASUS. In each such
instance, regardless of the basis on which you are entitled to claim damages
from ASUS, ASUS is liable for no more than damages for bodily injury
(including death) and damage to real property and tangible personal property;
or any other actual and direct damages resulted from omission or failure of
performing legal duties under this Warranty Statement, up to the listed
contract price of each product. ASUS will only be responsible for or indemnify
you for loss, damages or claims based in contract, tort or infringement under
this Warranty Statement. This limit also applies to ASUS’ suppliers and its
reseller. It is the maximum for which ASUS, its suppliers, and your reseller
are collectively responsible.
UNDER NO CIRCUMSTANCES IS ASUS LIABLE FOR ANY OF THE FOLLOWING:
- THIRD-PARTY CLAIMS AGAINST YOU FOR DAMAGES;
- LOSS OF, OR DAMAGE TO, YOUR RECORDS OR DATA; OR
- SPECIAL, INCIDENTAL, OR INDIRECT DAMAGES OR FOR ANY ECONOMIC CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS OR SAVINGS), EVEN IF ASUS, ITS SUPPLIERS OR YOUR RESELLER IS INFORMED OF THEIR POSSIBILITY.
SERVICE AND SUPPORT
Visit our multi-language website at:
https://www.asus.com/support/
Disclaimer
ASUS is not responsible for direct, indirect, intentional or unintentional
damages resulting from improper installation and operation.
Safety precautions
- Keep liquids or moisture away from your Notebook PC before installing or removing any components.
- Place your Notebook PC on a stable surface before installing or removing any components.
- Detach the clip or flap before removing the signal cables to prevent damage.
- Disconnect the power plug by pulling the plug evenly to avoid damage. Ensure to connect the signal cables in the correct orientation.
- Disconnect all power cables and remove the battery pack (if applicable) before cleaning your Notebook PC with liquid detergent to avoid risk of electric shock.
- Disconnect all power cables and remove the battery pack (if applicable) before installing or removing any components. Be sure to thoroughly to read and follow the instructions in the manual.
- To avoid Electrostatic Discharge (ESD) damage the electric components inside your computer, before handling components, use a grounded wrist strap or touch a safely grounded object to prevent electric products damaged by the electrostatic discharge. Please refer to Electrostatic Discharge (ESD) Protection Notes.
- Keep liquids or moisture away from your Notebook PC to avoid short circuiting.
- Hold components by the edges to avoid touching the Integrated Circuits (ICs).
- Before re-connecting the AC power, ensure all components are properly installed.
- Reduce the risk of fire or explosion by avoiding incompatible power adapters or batteries. Use only certified power adapters or batteries supplied by ASUS or authorized retailers.
- Ensure the correct screw models are re-installed to your Notebook PC to prevent damage.
Protection of Stored Data
For Your important data, please make periodic back-up copies of all the data
stored on the hard disk or other storage devices as a precaution against
possible failures, alteration, or loss of the data.
ASUS AND ITS AFFILIATES WILL NOT BE HELD LIABLE FOR ANY OF YOUR CONFIDENTIAL,
PROPRIETARY OR PERSONAL DATA NOR ANY LOST OR CORRUPTED DATA, PROGRAMS OR
SOFTWARE. IF YOUR DATA IS ALTERED OR LOST DUE TO ANY TROUBLE, FAILURE OR
MALFUNCTION OF THE PRODUCT AND THE DATA CANNOT BE RECOVERED, WE SHALL NOT BE
LIABLE FOR ANY DAMAGE OR LOSS TO DATA, SYSTEM, NETWORK, OR ANY OTHER DAMAGE
RESULTING THEREFROM. WHEN COPYING OR TRANSFERRING YOUR DATA, PLEASE BE SURE TO
CONFIRM WHETHER THE DATA HAS BEEN SUCCESSFULLY COPIED OR TRANSFERRED PRIOR TO
PROVISIONING OF SERVICES BY US. WE DISCLAIM ANY LIABILITY FOR THE FAILURE TO
COPY OR TRANSFER THE DATA CORRECTLY AND WILL HAVE NO LIABILITY FOR ANY ACTS OR
OMISSIONS, INCLUDING NEGLIGENCE, BY ASUS OR A THIRD-PARTY SERVICE PROVIDER.
Installation tools
-
Screwdriver
-
Non-conductive pry tool
-
Tweezers
-
Anti-static gloves
Before disassembly
A. Before your disassembly, we strongly recommend that you prepare a
smartphone or other handheld camera. During disassembly, use your camera to
take photos to help you remember the order of assembly and location of parts.
B. When lifting the
base cover off, slowly and carefully open so the angle is as small as
possible. To avoid damaging the cables, please confirm they are disconnected
before opening the base cover completely.
C. After you open the base cover, be sure to disconnect the
battery cable first.
D. When replacing
components, if any materials, cables, tapes and others were touched or moved,
please return it to its original location before proceeding.
E. Avoid using too much force when fastening
screws to prevent hardware damage.
Removing the base cover
Disassembly Notice
NOTE :
The appearance of your Notebook PC’s bottom view may vary per model.
A. Remove the screw(s) from the Notebook PC’s base cover.
Assembly
Notice
B. Insert the non-
conductive pry tool at the “Start” positions of the notebook and slightly pry
up on the base cover. Follow the figure 2 to insert the non-conductive pry
tool and pry up the base cover. The appearance may vary due to different
models; however, the assembly and disassembly process would be the same as
the steps described below.
Disassembly steps:
IMPORTANT!
Avoid sliding the non-conductive pry tool along the side of your Notebook
PC to prevent damage. 
C. Pull out the
base cover and remove it completely from your Notebook PC.
Installing an M.2 card (SSD)
Refer to the following steps when installing a compatible M.2 card (SSD) in
your Notebook PC:
IMPORTANT
Purchase your M.2 card from authorized retailers of this Notebook PC to
ensure maximum compatibility and reliability.
WARNING
Disconnect all the connected peripherals, any telephone or
telecommunication lines and power connector (such as external power supply,
battery pack, etc.) before removing the base cover.
NOTE :
- The appearance of your Notebook PC’s bottom view and M.2 card may vary per model but the module installation remains the same.
- It is recommended that you install the M.2 card under professional supervision. You may also visit an authorized service center for further assistance.
Disassembly Notice
A. Before handling components, wear anti-static gloves to avoid damaging them
due to static electricity.
B. Remove the base cover.
NOTE :
For more details, refer to the removing the base cover section in this
manual.
C. Disconnect the cable from the battery connector.
Disassembly steps:
-
Use the non-conductive pry tool to push iron sheet.
-
Use the non-conductive pry tool to disconnect battery connector.
Disassembly Notice
D. Remove the M.2 card (SSD).
NOTE :
If there is material pasted on the M.2 card (SSD), when you replace M.2
card (SSD), please paste the material on the new M.2 card (SSD). (Not included
specification label.)
Disassembly steps:
- Remove the screw*1pc and M.2 card (SSD).
- Tear off the two ABSORBERS from M.2 card (SSD) front and back side. Please keep these parts, it will be reused for new SSD installation.
Assembly Notice
E. Paste the two ABSORBES to new M.2 card (SSD) front and back side.
F. Assembly the M.2
card (SSD).
Assembly steps:
- Align and insert the new M.2 card into the module slot.
- Secure the M.2 card in place by fastening the screw.
Assembly Notice
G. Please follow the below steps to attach the battery connector.
H. Install the base
cover at a slight tilt at upper side first, and then press the upper side of
base cover to fix from right to left.
I. Put the base
cover down slowly, and then press left and right side of base cover to fix,
and press lower side of base cover to fix.
Assembly Notice
J. Secure the base cover in place using the screws.
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