What Is the UHDS-808VW?
The OREI UHDS-808VW is an 8x8 4K seamless HDMI matrix with video wall support. It allows up to eight HDMI source devices to be routed to up to eight HDMI displays.
The UHDS-808VW can work as a standard 8-input, 8-output HDMI matrix, where each display can show the same or different HDMI source. It can also work as a video wall controller, allowing multiple displays to be combined into layouts such as 4x2, 2x2, 8x1, and other supported configurations.
The UHDS-808VW supports HDMI 2.0b, HDCP 2.2, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, seamless switching, video wall configuration, EDID management, output resolution scaling, color space settings, HDCP control, horizontal and vertical mirror, CEC control, audio matrixing, Optical audio extraction, balanced / unbalanced analog audio output, RS-232 control, TCP/IP control, Web GUI control, and front-panel control.
The UHDS-808VW is useful for professional AV setups, control rooms, sports bars, restaurants, retail displays, classrooms, conference rooms, houses of worship, security monitoring rooms, and video wall installations where multiple HDMI sources need to be routed or displayed across multiple screens.
IMPORTANT — UHDS-808VW Is a Matrix and Video Wall Controller
The UHDS-808VW is not just a basic HDMI splitter.
It is an 8-input, 8-output HDMI matrix that can route any HDMI input to any HDMI output.
It also supports video wall configuration, allowing selected outputs to be grouped together as one larger display wall.
This makes the product useful for both standard HDMI routing and multi-display video wall setups.
IMPORTANT — UHDS-808VW Supports 4K@60Hz, Not 8K or 4K@120Hz
The UHDS-808VW supports video resolutions up to 4K@60Hz 4:4:4.
It does not support 8K or 4K@120Hz.
For 8K or 4K@120Hz systems, use an HDMI 2.1 matrix or video processor that supports the required bandwidth and resolution.
IMPORTANT — Seamless Switching Is Supported
The UHDS-808VW supports seamless switching.
This means switching between HDMI sources is designed to happen faster and more smoothly than a basic HDMI matrix, reducing the long black-screen delay that can happen with standard HDMI switching.
This is useful in control rooms, display walls, presentation spaces, and commercial AV environments where fast source switching is important.
IMPORTANT — Video Wall Mode Is Not the Same as Extended Desktop
The UHDS-808VW can create video wall layouts across multiple connected displays.
However, it is not a computer docking station or KVM switch, and it does not create a multi-monitor extended desktop from one computer by itself.
Video wall mode processes HDMI video across multiple screens. If a computer needs true extended desktop operation, the computer or graphics card must provide the required display outputs.
IMPORTANT — Audio Extraction Is Available for All 8 Outputs
The UHDS-808VW includes audio extraction for each HDMI output.
It includes:
- 8 Optical audio outputs
- 8 balanced / unbalanced analog audio outputs using 5-pin Phoenix connectors
This allows audio from each output path to be sent separately to an amplifier, speaker system, audio processor, or other compatible audio device.
IMPORTANT — Analog Audio Output Supports LPCM 2.0 Only
The balanced / unbalanced analog audio outputs support LPCM 2.0 audio.
If analog audio is not working, set the HDMI source device to PCM, LPCM, or Stereo audio.
The analog audio outputs do not output Dolby Digital, DTS, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, or other surround formats as analog audio.
IMPORTANT — Optical Audio Output Has Format Limits
The Optical outputs support LPCM 2.0, Dolby, and DTS 5.1.
If there is no audio from Optical, make sure the connected soundbar, AVR, amplifier, or audio system supports the selected audio format.
For troubleshooting, set the source device to PCM stereo or Dolby / DTS 5.1 depending on what the connected audio device supports.
IMPORTANT — Mirror Function Can Help With Video Wall Installation
The UHDS-808VW supports horizontal mirror, vertical mirror, and H+V mirror.
H+V mirror rotates the image 180 degrees.
This is useful when top displays are mounted upside down in a video wall to reduce bezel gaps or simplify installation.
Mirror settings can be configured from the Web GUI or RS-232 commands.
IMPORTANT — Web GUI Requires Network Setup
The UHDS-808VW can be controlled through a browser-based Web GUI using the TCP/IP port.
The default IP address is:
| Setting | Default Value |
| IP Address | 192.168.0.100 |
| Subnet Mask | 255.255.255.0 |
| Gateway | 192.168.0.1 |
| TCP/IP Port | 8000 |
| Telnet Port | 23 |
To access the Web GUI, the computer must be on the same network segment as the matrix.
For example, if the matrix IP address is 192.168.0.100, set the computer IP address to something like 192.168.0.120.
Default Web GUI login:
| Username | Password |
| User | user |
| Admin | admin |
IMPORTANT — RS-232 and Web GUI May Take a Few Minutes After Power-On
The manual notes that RS-232 and Web GUI control become available a few minutes after the device is powered on.
If RS-232 or Web GUI control does not respond immediately after startup, wait a few minutes and try again.
Ports and Panel Layout
| Port / LED / Button | Location | Function |
| OLED Screen | Front panel | Displays matrix switching status and device information |
| PWR LED | Front panel | Green when powered on; red when in standby |
| IR Window | Front panel | Receives signal from the included IR remote |
| INPUT Buttons 1–8 | Front panel | Select HDMI input source |
| OUTPUT Buttons 1–8 | Front panel | Select HDMI output channel |
| MENU / ENTER / UP / DOWN | Front panel | Used for OLED menu navigation and settings |
| POWER Button | Front panel | Long press 1 second for standby; short press to wake the device |
| LOCK Button | Front panel | Locks or unlocks front-panel buttons, except power |
| HDMI Inputs 1–8 | Rear panel | Connect HDMI source devices such as DVD player, set-top box, PC, or media player |
| HDMI Outputs 1–8 | Rear panel | Connect HDMI displays such as TVs, monitors, or projectors |
| Optical Audio Outputs 1–8 | Rear panel | Digital Optical / S/PDIF audio outputs |
| L/R Audio Outputs 1–8 | Rear panel | Balanced or unbalanced analog audio outputs using 5-pin Phoenix connectors |
| TCP/IP | Rear panel | RJ45 port for Web GUI or network control |
| RS-232 | Rear panel | D-Sub 9-pin port for RS-232 command control |
| IR EXT | Rear panel | Connects the included IR receiver cable when the front IR window is blocked |
| DC 24V | Rear panel | Connect the included 24V/3.75A power adapter |
| GND | Rear panel | Connects the housing to ground |
Step-by-Step Setup
- Connect the included 24V/3.75A power adapter to the UHDS-808VW.
- Connect your HDMI source devices to HDMI Input 1 through HDMI Input 8.
Examples include PCs, Blu-ray players, DVD players, streaming devices, cable boxes, satellite receivers, camera systems, or media players. - Connect HDMI Output 1 through HDMI Output 8 to your TVs, monitors, projectors, commercial displays, or video wall displays.
- If using audio extraction, connect the Optical or L/R audio output for the desired output channel to an amplifier, soundbar, AVR, powered speaker, or audio processor.
- If using Web GUI control, connect the TCP/IP port to a router, network switch, or computer using a CAT cable.
- If using RS-232 control, connect the RS-232 port to a PC or control system using the included USB to RS-232 serial cable.
- If the unit is installed inside a cabinet or out of IR line of sight, connect the included IR receiver cable to the IR EXT port.
- Power on the HDMI sources, displays, audio devices, and UHDS-808VW.
- Use the front-panel buttons, IR remote, Web GUI, RS-232 commands, or TCP/IP control to route inputs to outputs.
- For video wall setup, use the Web GUI Video Wall page or RS-232 commands to set rows, columns, output assignments, source selection, bezel adjustment, synchronization, and output resolution.
HDMI Cable Requirement — Critical
For best performance, use Premium High Speed HDMI cables.
The manual lists the following HDMI cable length guidance:
| Video Resolution | Recommended HDMI Cable Length |
| 4K60 | 5m / 16ft |
| 4K30 | 10m / 32ft |
| 1080p60 | 15m / 50ft |
Poor-quality or longer HDMI cables may cause:
- No video output
- Flickering
- Black screen
- Signal dropouts
- Audio dropouts
- HDCP handshake issues
- 4K@60Hz not displaying correctly
- Video wall alignment issues
- Seamless switching problems
For troubleshooting, test the source directly with the display, try shorter HDMI cables, and lower the output resolution temporarily.
Understanding Matrix Routing
The UHDS-808VW allows any HDMI input to be routed to any HDMI output.
| Output | Available Input Options |
| Output 1 | Input 1–8 |
| Output 2 | Input 1–8 |
| Output 3 | Input 1–8 |
| Output 4 | Input 1–8 |
| Output 5 | Input 1–8 |
| Output 6 | Input 1–8 |
| Output 7 | Input 1–8 |
| Output 8 | Input 1–8 |
This means each display can show a different source, or multiple displays can show the same source.
Example:
| Output | Selected Source |
| Output 1 | Input 1 |
| Output 2 | Input 3 |
| Output 3 | Input 5 |
| Output 4 | Input 8 |
Understanding Front-Panel Switching
To route a source from the front panel:
- Press the desired OUTPUT button.
- Press the desired INPUT button.
Example:
To route Input 3 to Output 2:
- Press OUTPUT 2.
- Press INPUT 3.
The OLED screen displays matrix switching status and device information.
Understanding the IR Remote
The included IR remote can control power, input selection, output selection, and all-output routing.
| Remote Button | Function |
| Power | Powers on the matrix or sets it to standby |
| Input 1–8 | Selects HDMI input source |
| Output 1–8 | Selects HDMI output channel |
| All | Selects all output channels at the same time |
| Left / Right Arrows | Selects the previous or next input source |
To route a source using the remote, press the OUTPUT button first, then press the desired INPUT button.
Example: Press Output 4, then Input 2 to send Input 2 to Output 4.
To send one source to all outputs, press All, then press the desired Input button.
Understanding IR EXT
The UHDS-808VW includes an IR EXT port.
Use the included IR receiver cable when the matrix is installed inside a cabinet, rack, closet, or any location where the front IR window is blocked.
IR remote distance:
| IR Method | Distance |
| Front IR window, direct facing | Up to 8m |
| Front IR window, ±45° angle | Up to 5m |
| IR EXT receiver, direct facing | Up to 5m |
| IR EXT receiver, ±45° angle | Up to 3m |
Understanding Video Wall Mode
The UHDS-808VW supports video wall configuration through the Web GUI and RS-232 commands.
The Video Wall page allows users to create display layouts by setting rows and columns. The range of rows and columns is 1–8.
Basic video wall setup:
- Open the Web GUI.
- Go to the Video Wall page.
- Set the number of rows and columns.
- Click Set to apply the screen layout.
- Assign each screen to the correct HDMI output port.
- Select adjacent screens to splice together.
- Use the right-click menu to configure the spliced screens.
- Select the input source for the video wall.
- Set the output resolution if needed.
- Adjust horizontal and vertical bezel settings if needed.
- Save the preset if the layout will be used again.
Supported video wall layouts depend on the selected row and column configuration, such as 1x8, 2x4, 4x2, 2x2, and other layouts within the 8-output limit.
Understanding Video Wall Right-Click Options
The Web GUI Video Wall page allows spliced screens to be configured using a right-click menu.
Common options include:
| Option | Function |
| Cancel Screen Splicing | Removes the selected screens from the video wall group |
| Select Input Source | Chooses which HDMI input appears on the video wall |
| Output Resolution | Sets the output resolution for the selected wall/group |
| Horizontal Bezel | Adjusts horizontal bezel compensation |
| Vertical Bezel | Adjusts vertical bezel compensation |
| Output Synchronization | Sets screen output synchronization |
Before splicing, each screen must be assigned to an output port through the right-click menu.
Understanding Bezel Adjustment
Bezel adjustment helps correct the image across display borders in a video wall.
The UHDS-808VW supports horizontal and vertical bezel adjustment.
Use bezel adjustment when objects, lines, or text appear broken or misaligned across display borders.
This is especially useful for 2x2, 4x2, 2x4, and 8-display video wall layouts.
Understanding Mirror / 180° Rotation
The UHDS-808VW supports mirror settings for each output.
| Mirror Mode | Function |
| Mirror Off | Normal image orientation |
| H Mirror On | Horizontal mirror |
| V Mirror On | Vertical mirror |
| H + V Mirror On | 180° image rotation |
H + V mirror is useful when displays are physically mounted upside down, such as top-row TVs in a video wall installation.
Understanding Output Resolution Scaling
The UHDS-808VW allows output resolution to be set for each output.
Available output resolution options include:
| No. | Output Resolution |
| 1 | 4096x2160p60 |
| 2 | 4096x2160p50 |
| 3 | 3840x2160p60 |
| 4 | 3840x2160p50 |
| 5 | 3840x2160p30 |
| 6 | 1920x1080p60 |
| 7 | 1920x1080p50 |
| 8 | 1920x1080i60 |
| 9 | 1920x1080i50 |
| 10 | 1920x1200p60 RB |
| 11 | 1360x768p60 |
| 12 | 1280x800p60 |
| 13 | 1280x720p60 |
| 14 | 1280x720p50 |
| 15 | 1024x768p60 |
| 16 | Auto |
Use Auto when the output should select the proper resolution based on the display EDID.
Use 4K@60Hz output modes only when the connected display and HDMI cable support 4K@60Hz.
Understanding Color Space Settings
The UHDS-808VW allows color space to be set per output.
Available color space options include:
| Color Space Option |
| RGB 4:4:4 |
| YUV 4:4:4 |
| YUV 4:2:2 |
| YUV 4:2:0 |
For most setups, leave the setting at the default unless a display or installation requires a specific color format.
Understanding EDID Management
The UHDS-808VW includes 22 EDID modes.
It has:
- 12 factory-defined EDID settings
- 2 user-defined EDID modes
- 8 copy EDID modes
| No. | EDID Mode |
| 1 | 4K60, 2.0CH |
| 2 | 4K60, 5.1CH |
| 3 | 4K60, 7.1CH |
| 4 | 4K30, 2.0CH |
| 5 | 4K30, 5.1CH |
| 6 | 4K30, 7.1CH |
| 7 | 1080P, 2.0CH |
| 8 | 1080P, 5.1CH |
| 9 | 1080P, 7.1CH |
| 10 | 1920x1200, 2.0CH |
| 11 | 1360x768, 2.0CH |
| 12 | 1024x768, 2.0CH |
| 13 | USER1 |
| 14 | USER2 |
| 15 | COPY OUT1 |
| 16 | COPY OUT2 |
| 17 | COPY OUT3 |
| 18 | COPY OUT4 |
| 19 | COPY OUT5 |
| 20 | COPY OUT6 |
| 21 | COPY OUT7 |
| 22 | COPY OUT8 |
Use 4K60 EDID modes for HDMI 2.0 displays.
Use 1080p or lower EDID modes for older displays or troubleshooting.
Use 5.1CH or 7.1CH EDID modes only when the connected audio system supports those formats.
Use Copy Output modes when you want the source to follow the capability of a specific connected display.
Understanding Audio Extraction and Audio Matrix
The UHDS-808VW supports external audio routing through Optical and balanced / unbalanced analog audio outputs.
There are three audio modes:
| Audio Mode | Function |
| Bind to Input | Audio output follows the HDMI input |
| Bind to Output | Audio output follows the HDMI output |
| Audio Matrix | Any input audio can be routed to a selected audio output |
In Bind to Input mode, each HDMI input has a one-to-one match with the audio output.
In Bind to Output mode, the audio output follows the HDMI output routing. For example, if HDMI Input 3 is routed to HDMI Output 1, Audio Output 1 follows HDMI Input 3.
In Audio Matrix mode, extracted audio can be routed independently from the video.
Understanding Web GUI Control
The UHDS-808VW supports browser-based Web GUI control.
The Web GUI can be used to:
- View device status
- Route HDMI inputs to outputs
- Save or clear matrix presets
- Rename inputs and outputs
- Check input signal status
- Set EDID modes
- Upload or download EDID files
- Set output resolution
- Set color space
- Set HDCP behavior
- Set mirror mode
- Turn output stream on or off
- Configure video wall layouts
- Adjust bezel settings
- Set output synchronization
- Configure audio output mode
- Use audio matrixing
- Control CEC functions
- Change network settings
- Change passwords
- Lock or unlock the front panel
- Turn beep on or off
- Set LCD / OLED display time
- Display test patterns
- Change serial baud rate
- Update firmware
- Factory reset or reboot the device
Understanding Network Setup
The default IP address is 192.168.0.100.
The current IP address can be checked in two ways:
- From the front panel
Press MENU, go to SETUP, then select IP INFO. - Through RS-232
Send the command r ip addr! to view the current IP address.
To access the Web GUI, connect the TCP/IP port to a computer or network and make sure the computer is on the same network segment.
For example, if the UHDS-808VW is using 192.168.0.100, the computer can be set to 192.168.0.120.
Understanding Presets
The UHDS-808VW supports matrix and video wall presets.
Matrix presets allow routing layouts to be saved and recalled.
Video wall presets allow video wall configurations to be saved and recalled.
Up to 8 matrix presets and up to 8 video wall presets can be controlled through RS-232 commands.
Presets are useful when the same room needs different display modes, such as presentation mode, sports mode, video wall mode, or monitoring mode.
RS-232 Control
The UHDS-808VW supports RS-232 command control through the rear D-Sub 9-pin port.
Default RS-232 settings:
| Setting | Value |
| Baud Rate | 115200 |
| Data Bits | 8 |
| Stop Bits | 1 |
| Check Bit | 0 |
RS-232 commands can control:
- Power on/off
- Beep on/off
- Front-panel lock
- LCD / OLED display time
- RS-232 baud rate
- Fan control
- Reboot
- Factory reset
- Output resolution
- Output color space
- Output HDCP mode
- Output mirror mode
- Output stream enable / disable
- No-signal background pattern
- EDID setting
- Matrix routing
- Matrix presets
- Video wall mode
- Video wall rows and columns
- Video wall screen assignment
- Video wall group source
- Horizontal and vertical bezel
- Video wall output resolution
- Video wall presets
- External audio enable / disable
- External audio mode
- Audio matrix routing
- CEC control
- Network settings
Understanding CEC Control
The UHDS-808VW supports CEC management through the Web GUI and RS-232 commands.
CEC functions include:
- Source power on / off
- Source menu navigation
- Play / pause / stop
- Fast forward / rewind
- Previous / next
- Mute / unmute
- Volume up / down
- Display power on / off
CEC behavior depends on whether the connected source devices and displays support CEC and have CEC enabled.
What Source Devices Is the UHDS-808VW Compatible With?
The OREI UHDS-808VW is compatible with HDMI source devices such as:
- PCs
- Laptops with HDMI output
- Blu-ray players
- DVD players
- Streaming devices
- Cable boxes
- Satellite receivers
- TV boxes
- Set-top boxes
- Media players
- Gaming consoles
- Security DVRs
- Camera systems
- Presentation systems
For 4K@60Hz, the source device, HDMI cable, matrix, and display must all support HDMI 2.0 bandwidth.
What Displays Is the UHDS-808VW Compatible With?
The UHDS-808VW can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Monitors
- Projectors
- Commercial displays
- Video wall panels
- Control room displays
- Sports bar displays
- Retail displays
- Classroom displays
- Conference room displays
For video wall use, displays should ideally be the same size and resolution for the cleanest result.
What Audio Devices Is the UHDS-808VW Compatible With?
The UHDS-808VW can send audio to:
- Optical soundbars
- AV receivers
- Audio processors
- Amplifiers
- Powered speakers
- Balanced audio systems
- Unbalanced analog audio systems
- HDMI TVs or AVRs through HDMI output
For analog audio output, set the source to PCM or Stereo.
For Optical audio output, use PCM stereo, Dolby, or DTS depending on what the connected audio system supports.
Frequently Asked Questions
Q: What is the OREI UHDS-808VW used for?
A: The UHDS-808VW is used to connect up to eight HDMI source devices to up to eight HDMI displays. It can route any input to any output and also supports seamless switching, video wall layouts, audio extraction, audio matrixing, EDID management, Web GUI, RS-232, and TCP/IP control.
Q: Is the UHDS-808VW a matrix?
A: Yes. It is an 8-input, 8-output HDMI matrix.
Q: Is the UHDS-808VW a video wall controller?
A: Yes. It supports video wall configuration through the Web GUI and RS-232 commands.
Q: Is the UHDS-808VW just a splitter?
A: No. It can send the same source to multiple displays, but it is more than a splitter because each output can independently select any input.
Q: Can each output show a different source?
A: Yes. Each of the eight outputs can show a different HDMI input.
Q: Can all displays show the same source?
A: Yes. Use the All button on the remote, front-panel routing, Web GUI, or RS-232 command to route one input to all outputs.
Q: How many HDMI sources can I connect?
A: You can connect up to eight HDMI source devices.
Q: How many displays can I connect?
A: You can connect up to eight HDMI displays.
Q: Does the UHDS-808VW support 4K@60Hz?
A: Yes. It supports video resolutions up to 4K@60Hz 4:4:4 with 18Gbps bandwidth.
Q: Does the UHDS-808VW support 8K?
A: No. The UHDS-808VW supports up to 4K@60Hz. It does not support 8K.
Q: Does the UHDS-808VW support 4K@120Hz?
A: No. It supports up to 4K@60Hz.
Q: Does the UHDS-808VW support HDCP 2.2?
A: Yes. The manual lists HDCP 2.2 compliance.
Q: Does the UHDS-808VW support seamless switching?
A: Yes. The manual lists seamless switching support.
Q: What video wall layouts can I create?
A: The Web GUI supports row and column layouts from 1 to 8 within the 8-output limit, such as 1x8, 2x4, 4x2, and 2x2.
Q: Can I flip the image on the top TVs to reduce bezel gaps?
A: Yes. Use H Mirror, V Mirror, or H+V Mirror in the Web GUI. H+V Mirror rotates the image 180 degrees.
Q: Does it support bezel adjustment?
A: Yes. Horizontal and vertical bezel adjustment is supported for video wall groups.
Q: Does the UHDS-808VW have audio extraction?
A: Yes. It includes Optical and balanced / unbalanced analog audio outputs for each of the eight outputs.
Q: What audio does the Optical output support?
A: Optical supports LPCM 2.0, Dolby, and DTS 5.1.
Q: What audio does the analog output support?
A: The balanced / unbalanced analog audio output supports LPCM 2.0.
Q: Why am I not getting audio from the analog output?
A: Set the source device audio output to PCM, LPCM, or Stereo because analog output supports LPCM 2.0 only.
Q: Does HDMI audio still pass through to the displays?
A: Yes. HDMI audio passes through to connected displays and supports formats including LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-HD Master Audio, and DSD when supported by the connected equipment.
Q: What audio routing modes are available?
A: The available modes are Bind to Input, Bind to Output, and Audio Matrix.
Q: What does Audio Matrix mode do?
A: Audio Matrix mode allows extracted audio to be routed independently from HDMI video routing.
Q: Does the UHDS-808VW support EDID management?
A: Yes. It supports 12 factory EDID modes, 2 user-defined EDID modes, and 8 copy EDID modes.
Q: Can I upload a custom EDID?
A: Yes. The Web GUI allows EDID files to be uploaded to User Define 1 or User Define 2.
Q: Can I control the UHDS-808VW from a web browser?
A: Yes. Connect the TCP/IP port to the network and access the Web GUI using the matrix IP address.
Q: What is the default IP address?
A: The default IP address is 192.168.0.100.
Q: What are the default Web GUI login credentials?
A: The default User login is user, and the default Admin login is admin.
Q: How do I find the current IP address?
A: Use the front-panel MENU > SETUP > IP INFO option, or send the RS-232 command r ip addr!.
Q: What should I do if I cannot access the Web GUI?
A: Make sure your PC IP address is in the same segment as the matrix. For example, if the matrix is 192.168.0.100, set the PC IP to 192.168.0.120.
Q: Does the UHDS-808VW support RS-232 control?
A: Yes. It supports RS-232 command control through the rear D-Sub 9-pin port.
Q: What is the default RS-232 baud rate?
A: The default RS-232 baud rate is 115200.
Q: Can I save presets?
A: Yes. Matrix presets and video wall presets can be saved and recalled.
Q: How do I switch sources from the front panel?
A: Press the desired OUTPUT button first, then press the desired INPUT button.
Q: How do I send one input to all outputs using the remote?
A: Press All, then press the desired Input button.
Q: What HDMI cable length is recommended?
A: The manual lists 5m / 16ft for 4K60, 10m / 32ft for 4K30, and 15m / 50ft for 1080p60.
Q: What should I do if there is no video output?
A: Check that the correct input is routed to the output, confirm HDMI cables are connected properly, try shorter HDMI cables, check EDID settings, and lower the output resolution for testing.
Q: What should I do if Web GUI or RS-232 does not respond after power-on?
A: Wait a few minutes after powering on the device. The manual notes that RS-232 and Web GUI become available a few minutes after startup.
Q: Does the UHDS-808VW need external power?
A: Yes. Connect the included 24V/3.75A power adapter.
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