ASUSTeK COMPUTER VA27EHF User manual

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Monitor Service Manual
Model: VA27EHF
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Version no. V01
Release date: Dec.07, 2023
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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 © 2023 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: (1) THIRD-PARTY CLAIMS
AGAINST YOU FOR DAMAGES; (2) LOSS OF, OR DAMAGE TO, YOUR RECORDS OR DATA; OR (3) 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/

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Table of Contents
1. Safety Precautions................................................................................................................................................4
2. Exploded View ......................................................................................................................................................5
3. Disassembly & Assembly SOP.............................................................................................................................7
4. Trouble shooting .................................................................................................................................................22

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1.Safety Precautions
Safety information
Before setting up the monitor, carefully read all the documentation that came with the package.
To prevent fire or shock hazard, never expose the monitor to rain or moisture.
Never try to open the monitor cabinet. The dangerous high voltages inside the monitor may result in serious
physical injury.
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
Before using the product, make sure all cables are correctly connected and the power cables are not damaged. If
you detect any damage, contact your dealer immediately.
Slots and openings on the back or top of the cabinet are provided for ventilation. Do not block these slots. Never
place this product near or over a radiator or heat source unless proper ventilation is provided.
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the
type of power supply to your home, consult your dealer or local power company.
Use the appropriate power plug which complies with your local power standard.
Do not overload power strips and extension cords. Overloading can result in fire or electric shock.
Avoid dust, humidity, and temperature extremes. Do not place the monitor in any area where it may become wet.
Place the monitor on a stable surface.
Unplug the unit during a lightning storm or if it will not be used for a long period of time. This will protect the monitor
from damage due to power surges.
Never push objects or spill liquid of any kind into the slots on the monitor cabinet.
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured
receptacles marked between 100-240V AC.
If you encounter technical problems with the monitor, contact a qualified service technician or your retailer.
Care & Cleaning
Before you lift or reposition your monitor, it is better to disconnect the cables and power cord. Follow the correct
lifting techniques when positioning the monitor. When lifting or carrying the monitor, grasp the edges of the monitor.
Do not lift the display by the stand or the cord.
Cleaning. Turn your monitor off and unplug the power cord. Clean the monitor surface with a lint-free, non-abrasive
cloth. Stubborn stains may be removed with a cloth dampened with mild cleaner.
Avoid using a cleaner containing alcohol or acetone. Use a cleaner intended for use with the LCD. Never spray
cleaner directly on the screen, as it may drip inside the monitor and cause an electric shock.
The following symptoms are normal with the monitor
The screen may flicker during the initial use due to the nature of the fluorescent light. Turn off the Power Switch and
turn it on again to make sure that the flicker disappears.
You may find slightly uneven brightness on the screen depending on the desktop pattern you use.
When the same image is display for hours, an afterimage of the previous screen may remain after switching the
image. The screen will recover slowly or you can turn off the Power Switch for hours.
When the screen becomes black or flashes, or cannot work anymore, contact your dealer or service center to fix it.
Do not repair the screen by yourself!
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2. Exploded View
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No. ASUS Description
1 MIDDLE_FRAME
2 REAR_COVER
3 PANEL
4 MAINFRAME
5 STAND
6 BASE
7 KEY BOARD
8 LED BOARD
9 POWER BOARD
10 MAIN BOARD
S1 MAINFRAME SCREW
S2 SCREW D3 6
S3 SCREW M4*10
S4 SCREW Q2 4

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3. Disassembly & Assembly SOP
3.1. Precaution
Please read the precautions as follows to prevent any damages to the LCD Monitor.
Make sure all power connection is removed. Be sure that the LCD Monitor is in power off status.
Prepare soft cloth and sponge as
working platform to place LCD
monitor horizontally.
Hold LCD by the side carefully and
DON’T touch or press panel
directly.
3.2. Appropriate tools
Please according to different screw specifications choose different screwdrivers and heads.
The below photos are for reference only.
Screwdriver
Screwdriver
HEX header screwdriver
Screwdriver
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Disassembly tool

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3.3. Disassembly Procedure
Information in this section is to perform the disassembly procedure of the LCD monitor. Depending on the failures,
replace the defective parts accordingly.
ASUS VA27EHF LCD monitor consists of various subsystems. This section describes the procedures for LCD
monitor disassembly. In addition, the detailed disassembly procedures of individual subsystem will be provided for
your service needs.
The disassembly procedure consists of the following steps:
3.3.1 Stand Subsystem
3.3.2 Main Subsystem
3.3.3 Panel
3.3.1 Stand Subsystem
1. Remove the stand & base ass’y.
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2. Release the screws to separate the hinge and stand.
Description Q’ty Screw Torque Picture &Spec
Screw(hinge/
stand)
3 12±2kgf.cm
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3. Unscrew the screws as below.
Description Q’ty Screw Torque Picture &Spec
Screw(Rear
cover /Panel)
2 6±1kgf.cm
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3.3.2 Main Subsystem 
1. Use disassembly tool to open all the latches along the edge of the Rear Cover. (Note: Start to open the latches
from bottom. Please operate in sequence as below until separate the panel from rear cover. Don’t damage the key
board.）
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2. Gently open the rear cover and disconnect the cables to remove the Rear Cover.
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Key Board 
Release the screws to remove the key board from the rear cover.
Description Q’ty Screw
Torque
Picture &Spec
Screw(Rear
cover/key board)
3 2±0.5kgf.cm
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MAIN_FRAME
1. Tear up the tapes and disconnect cables. Unscrew the screws to remove the main frame.
Description Q’ty Screw Torque Picture &Spec
Screw(main
frame /Panel)
1 3±0.5kgf.cm
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2. Remove the Mylar.
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Main Board and Power Board
1. Unscrew the screws and take out the main board and power board.
Description Q’ty Screw Torque Picture &Spec
Screw-Red(main
board/power
board/main
frame)
4 6±1kgf.cm
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Screw-Blue
(power board/
main frame)
1 6±1kgf.cm
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2. Turn over the Main Board and the Power Board, disconnect the cables.
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3.3.3 Panel
Release screws marked in red to separate the panel & the middle frame. Take out the LED board.
Description Q’ty Screw Torque Picture &Spec
Screw(middle
frame/panel)
9 3±0.5kgf.cm
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3.4 Assembly Procedure
3.4.1 Panel
1. Prepare the panel and middle frame. Use a screwdriver to tighten the screws. Assemble the LED board.
Description Q’ty Screw Torque Picture &Spec
Screw(middle
frame/panel)
9 3±0.5kgf.cm
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3.4.2 Main subsystem
Main board and Power board
1. Prepare a main board, a power board and some essential cables. Connect every pins.
2. Use a screwdriver to tighten the screws. Put on the mylar.
Description Q’ty Screw Torque Picture &Spec
Screw-Red(main
board/power
board/main
frame)
4 6±1kgf.cm
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Screw-Blue
(power board/
main frame)
1 6±1kgf.cm
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Main frame
1. Put the main frame on panel. Connect the pins and tighten the screws to assemble the main frame. Paste the
tapes.
Description Q’ty Screw Torque Picture &Spec
Screw(main
frame /Panel)
1 3±0.5kgf.cm
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Key board
Tighten the screws to assemble the key board to the rear cover.
Description Q’ty Screw
Torque
Picture &Spec
Screw(Rear
cover/key board)
3 2±0.5kgf.cm
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Connect the pins (key board/LED board to main board). Carefully assemble the rear cover. Tighten the screws.
Description Q’ty Screw Torque Picture &Spec
Screw(Rear
cover /Panel)
2 6±1kgf.cm
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