Lenovo THinkVision T75 Installation guide

LFD Conference Machine Series FAQ
Product type
Commercial conference machine
Equipment model
iLFD
Version information
V2.0
Issue date
2022-7-15
Organization
Examine

CONTENTS
1． How can I confirm the iFLD’s serial number and model?----------------------------1
2． How do l setup my iFLD? -----------------------------------------------------------------1
3． How do I setup the Network on my iFLD? ---------------------------------------------2
4． How do I setup the Low Blu-Ray on my iFLD? ---------------------------------------2
5． How do l check my iFLD software version? -------------------------------------------3
6． Where do l find the iFLD's Storage Space?---------------------------------------------3
7． Where do l find the iFLD's factory Default and reset? --------------------------------3
8． Where do l find the iFLD's External Signal Source options ?------------------------4
9． How do l Lock Screen? --------------------------------------------------------------------4
10． White screen, white screen, flashing screen-------------------------------------------5
11． Automatic on / off when not in operation----------------------------------------------5
12． The large screen has no power, and the indicator light does not light up after
power on -------------------------------------------------------------------------------------------6
13． Black screen and dark display backlight-----------------------------------------------6
14． Screen flash --------------------------------------------------------------------------------7
15． Large screen garbage display------------------------------------------------------------7
16． Screen ghosting----------------------------------------------------------------------------7
17． Display double split screen --------------------------------------------------------------8
18． Screen display line and vertical strip ---------------------------------------------------8
19． Screen edge dark area---------------------------------------------------------------------8
20． No touch ------------------------------------------------------------------------------------8
21． Touch failure in large screen area -------------------------------------------------------8
22． Touch skip point ---------------------------------------------------------------------------9
23． Inaccuracy of touch -----------------------------------------------------------------------9
24． No sound from Android horn ------------------------------------------------------------9
25． Abnormal sound of horn --------------------------------------------------------------- 10
26． The remote control cannot be used --------------------------------------------------- 10

27． Front USB not working ---------------------------------------------------------------- 10
28． The front power on key has no function --------------------------------------------- 11
29． Large screen boot without image ----------------------------------------------------- 11
30． When writing, there are shaking (jumping) pen and broken pen (some can write)
----------------------------------------------------------------------------------------------------- 12
31． A lock appears on the screen ---------------------------------------------------------- 13
32． The wireless projector cannot cast the screen --------------------------------------- 14
33． Network connection failed ------------------------------------------------------------- 15
34． No local sound can be heard in the video conference------------------------------ 16
35． The screen projector has no sound on the screen (computer)--------------------- 17
36． Android and apple mobile phone projection ---------------------------------------- 18
37． Caton occurs when using app under Android --------------------------------------- 18
38． The screen projector is disconnected from time to time --------------------------- 18
39． There are lines on the large screen when it is not powered on, but there are no
lines when it is powered on-------------------------------------------------------------------- 19
40． Startup error: com mstar. IWB. Service stopped running ------------------------- 19
41． No touch in Android -------------------------------------------------------------------- 20
42． The Android camera is not recognized and cannot be connected ---------------- 20

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1．How can I
confirm the iFLD’s
serial number and
model?
1.1. On the back and side of the
iFLD, you can find the Side sticker
and Nameplate sticker.
1.2. Click the "Setting" icon in the"
More "interface to enter the setting
interface, the About Device
submenu is displayed. You can find
the iFLD's Serial Number and the
model.
If you want to contact Service
Center, please also provide the info
of the nameplate photos and so on.
2．How do l setup
my iFLD?
Click the "Setting" icon in the"
More "interface to enter the setting
interface, including common
functions, network Settings, time
and language, advanced Settings,
about devices and other
information.

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3．How do I setup
the Network on my
iFLD?
The Network sub-menu is
displayed, allowing you to set the
wireless network, wired network,
hotspot
information, and Bluetooth
functions.
● Wireless network: View the
MAC address of the device and
enable or disable Wi-Fi.
● On wired networks: View the
MAC address, IP address, gateway,
subnet mask, and DNS
information.
It can automatically obtain
LAN IP or LAN IP as required.
● Hotspot: You can set items
related to portable Wi-Fi hotspots.
● Bluetooth: Can be connected to
enable bluetooth function.
4．How do I setup
the Low Blue Lignt
on my iFLD?
Enter the low Blue light mode:
Click the "Settings" button in the
sidebar and select "Advanced
Settings" to enter the page. Then
select the "Low Blue Light Mode"
button and click to enter the low
blue light mode.
The product's "Low Blue light

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mode" is certified by TUV
RHINeland for low blue light. The
incidence of blue light problems
affecting eye health has increased
in recent years. Low blue light
technology can reduce blue light
levels. It is recommended to use
low blue light mode to protect your
eyes.
5．How do l check
my iFLD software
version?
Click the "Setting" icon in the"
More "interface to enter the setting
interface, the About Device
submenu is displayed. You can
select system Upgrade, Android
Version.
6．Where do l find
the iFLD's Storage
Space?
Click the "Setting" icon in the"
More "interface to enter the setting
interface, the About Device
submenu is displayed. You can find
Storage Space.
7．Where do l find
the iFLD's factory
Default and reset?
Click the "Setting" icon in the"
More "interface to enter the setting
interface, the About Device
submenu is displayed. You can
select factory Default.

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8．Where do l find
the iFLD's External
Signal Source
options ?
Click the signal source icon
"External Signal Source" in the
floating bar of the home page, and
the system pops up the external
signal port tool window (display
Built-in COMPUTER 、 Front
HDMI 、 front Type-C 、
Type-C 、HDMI 1 、HDMI 2 、
HDMI 3 、 DP 、VGA、AV ).
Click the "External Signal Source"
icon again to close the port
window.
Wired signal sources include Front
HDMI 、 front Type-C 、
Type-C 、 HDMI 1 、HDMI 2 、
HDMI 3 、 DP 、VGA 、AV.
Click the icon of signal source port,
and the intelligent large screen will
display the signal source screen in
full screen
9．How do l Lock
Screen?
In startup state, tap the "lock
screen" button of the remote
control to enter the lock screen
state, and the lock screen icon
appears on the interface, locking
the screen touch function.
You can exit the screen-locked

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state in the following ways:
● Press the "lock screen" button of
the remote control;
● Short press the front power
button;
● Tap the screen 3 times in quick
succession with your finger to
restore touch control.
10．White screen,
white screen,
flashing screen
1. IWB mainboard signal output
fault
1. Re -upgrade the software
2. The abnormal power supply of
220V mains power supply or
unstable voltage causes the power
board and LCD to burn out
2. Replace the new machine
11．Automatic on /
off when not in
1. Whether the timing switch is set
1. Turn off the automatic switch
function

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operation
2. Check whether the intelligent
large screen is in sleep state after
not operating for a long time
2. Set the smart screen never to
sleep
3. Check whether the input power
supply is stable
3. Plug in and out the input power
supply again
4. Re -upgrade the software
5. Replace the new machine
12．The large
screen has no
power, and the
indicator light does
not light up after
power on
1. Whether the power supply is
powered
1. Plug the power cord again, turn
on the AC, and then power on
2. Whether the power cord is firm
and whether the AC is turned on
2. Replace the new machine
13．Black screen
and dark display
backlight
1. Screen backlight line short
circuit
1. Replace the new machine
2. The power board is broken

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3. IWB board is broken
4. The internal connecting wire of
the front switch falls off or has
poor contact (caused by turbulence
during logistics transportation)
5. The connecting line of logic
board falls off or has poor contact
14．Screen flash
1. IWB mainboard program error
1. Re -upgrade the software
2. V-byone screen line is defective
2. Replace the new machine
15．Large screen
garbage display
1. Incorrect screen parameters
1. Re -upgrade the software
2. IWB mainboard card is defective
2. Replace the new machine
16．Screen
ghosting
1. Incorrect screen parameters
1. Re -upgrade the software

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2. IWB mainboard card is defective
2. Replace the new machine
17．Display
double split screen
1. Incorrect screen parameters
1. Re -upgrade the software
2. IWB mainboard card is defective
2. Replace the new machine
18．Screen display
line and vertical
strip
1. COF electrostatic breakdown
1. Replace the new machine
2. The cable is not plugged in
properly
3. Screen failure
19．Screen edge
dark area
1. dead light, screen problem
1. Replace the new machine
20．No touch
1. The infrared screen PCB touch
mainboard is broken
1. Download Android update
firmware and brush Android
system again
2. Android firmware program error
2. Reinstall the touch driver
3. Touch program lost
3. Replace the new machine
21．Touch failure
in large screen area
1. Poor contact of PCB connecting
line of infrared screen
1. Re-install the touch driver

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2. Re -upgrade the software
3. Replace the new machine
22．Touch skip
point
1. Poor grounding of infrared
screen
1. Check whether the external
power supply of the whole machine
is grounded
2. PCBA hardware failure of
infrared screen
2. Replace the new machine
23．Inaccuracy of
touch
1. Recalibration required
1. Re -calibration with infrared
screen calibration software
2. Replace the new machine
24．No sound
from Android horn
1. The remote control turns on
mute
1. Check whether the mute is
turned on or the volume is turned
to the lowest (0)
2. Re -upgrade the software
2. The horn is damaged
3. Replace the new machine

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3. the mainboard power amplifier is
damaged
4. IWB mainboard problem
25．Abnormal
sound of horn
1. The horn is overloaded due to
excessive power
1. Adjust the volume
2. Replace the new machine
26．The remote
control cannot be
used
1. The remote control battery is
dead
1. Replace the batteries inside.
Hold the remote control and see if
the transmitted hole is on the
mobile phone camera to see if there
is purple light.
2. The large screen remote control
is damaged
2. Replace the new remote control
27．Front USB not
working
1. Poor USB contact
1. Check whether there is foreign
matter in the USB port

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2. The internal USB cable is loose
2. Check whether other USB ports
are normal
3. Replace the new machine
28．The front
power on key has
no function
1. Loose connecting wire
1. Re insert the connecting wire
2. The front switch is broken
2. Replace the new machine
29．Large screen
boot without image
1. Video cable problem
1. Check whether the video cable
connected between the equipment
and the large screen is firmly
plugged in
2. Output resolution setting
2. Check whether the output
resolution set by the software is set
to adapt to the large screen
3. Re -upgrade the software
4. Replace the new machine

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30．When writing,
there are shaking
(jumping) pen and
broken pen (some
can write)
1. Incorrect writing mode (infrared
screen) or interference source
1. It is recommended to write with
a writing pen as far as possible,
hold the pen away from the pen tip
as far as possible, and the included
angle between the pen and the
screen surface should be greater
than 60 degrees as far as possible
(note that the sleeves or wrists
should not be close to the screen
surface),
2. Interference from strong light
source or infrared source
(capacitive screen)
2. Remove the interference source
or change to a non-interference
environment

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3. When writing, the required
shielding area is not reached or the
pen tip is too sharp
3. Replace the writing pen or write
the test with your finger
4. The infrared tube is blocked
4. Check whether there are foreign
objects on the infrared light strip
5. Whiteboard software failure
5. Re -upgrade the software
6. Replace the new machine
31．A lock appears
on the screen
1. The system lock is opened
1. Operate according to the
operation manual. Generally, the
default unlocking password is 2580

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32．The wireless
projector cannot
cast the screen
1. Whether the projector is matched
with the large screen
1. Insert the projector into the large
screen Android USB interface for
pairing. After the progress bar is
displayed successfully, pull out the
projector and insert it into the
computer for screen projection (the
laptop needs to run a small
program for the first screen
projection). The blue light of the
projector flashes, indicating that it
is connecting. If it does not flash,
the connection is successful, and
the screen projection is normal
2. Projection hotspot, channel
interference
2. Open the setting interface, enter
the projection hotspot, switch
channels, save and disconnect.
After powering on, re-pair the
projector.

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3. No response when the projector
is inserted into the large screen (no
progress bar)，
3. Check whether the screen
projection software under the
Android interface matches the
screen projector, and Make sure
large screen hotspots are 5G
hotspots.
4. Re -upgrade the software
5. Replace the new machine
33．Network
connection failed
1. Network cable connection
problem
1. Check whether the network
cable is firm
2. DHCP server allocation failed
2. Check whether the device is
connected to the local area network
and use the IP assigned by DHCP

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3. PC static IP setting error
3. The device is directly connected
to the PC through the network
without the IP address of the PC
4. Other devices in the LAN are the
same as IP
4. It is recommended to turn off the
WiFi of the control PC
5. Network module failure
5. Replace the new machine
34．No local
sound can be heard
in the video
conference
1. Check whether the microphone
is muted
1. Click the microphone logo
setting in the large screen
conference interface
2. Check whether the microphone
is connected successfully
2. Turn on the conference system -
Settings

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- audio and video test to test
whether the audio and video are
normal. (Note: the microphone and
camera need to be connected to the
large screen first, and then turn on
the conference system, otherwise
the connection will fail)
35．The screen
projector has no
sound on the screen
(computer)
1. Check the sound source
playback device and whether the
output source is correct
1. Turn on the computer sound
source playback device, select the
playback source (speaker) to be
output, and set it as the default
output,