Troubleshooting screen share stability for Miracast
Use this troubleshooting wizard to resolve stability issues with screen sharing.
When trying to connect my devices using Miracast, the following issues occur:
Devices may be able to connect reliably but don’t stay connected.
The video on the display lags behind the video on the device.
Display refers to the SMART Board interactive display or SMART Board display.
Device refers to the Windows computer that is sharing its screen.
What happens on the display when the connection drops?
Does the issue occur with only a specific model of computer?
Check with the manufacturer’s community forums and documentation to see if there are any known issues and advice related to Miracast for that model.
Do the devices have the most recent Windows operating system and drivers installed?
Update the devices to the latest operating system and install the latest graphics and network drivers.
Try sharing your screen again. If the issue persists, click Continue.
How far is the device from the display you are trying to broadcast to? If you move too far away, the Miracast connection may drop.
Start close to the display and move back slowly to determine how far you can reach before the connection drops.
Note
Factors such as the number of devices using the network and number of people in the room affect the connection range.
Check that the display’s antennas are not loose. Adjust the direction the antennas point to determine which directions provide the best results.
Try sharing your screen again. If the issue persists, click Continue.
How long can you share the screen until the connection is lost?
There may be a memory issue on the broadcasting device or display.
Try signing out of the display and signing in again.
Restart the app.
Tap Recents
and swipe up to close the app.Tap Reset SMART Screen Share.
Restart the device and/or the display to clear the memory.
On the display, tap Clean up.
Important
Check how Clean Up is configured in Settings so you are aware of what other data will be reset or cleaned up when performing this action.
Try sharing your screen again. If the issue persists, click Continue.
There may be issues with the network.
When the issue occurs, do you see any of the following?
Packet loss
Latency
A noise to signal ratio of more than -65 db
How many rooms are affected?
Where is the room located? The following factors can affect the strength and performance of a wireless signal:
The distance between the display and the device: The farther the display and device are from each other, the weaker the signal will be, which can result in slower network connections.
The physical construction of the room: Obstacles such as walls, floors, and ceilings can weaken wireless signals, especially if the obstructions are made of a material such as concrete. This can cause signal interference and result in slower networks and dropped connections.
The presence or proximity of other electronic devices: Devices such as microwaves, cordless phones, and Bluetooth speakers can emit signals in the same frequency range as the network, which can cause interference and disrupt the network connection.
Where possible, see if you can alter any of the above factors such as moving the router or access point closer to the physical room.
When does the issue occur?
Perform a site survey:
Check for open channels on the 2.4 or 5 GHz bands.
Ensure that there is no channel overlap within your corporate wireless environment. If there is significant noise on the same channels that Wi-Fi Direct is using, the user experience and performance may be significantly degraded.
Some tools you can use:
WiFi Analyzer (Android app)
Network Analyzer (Apple app)
If there are no open channels, Miracast will not work reliably.
Contact a network engineer for further support with your organization’s network setup.
SMART offers the following alternatives for sharing from a Windows device:
Use a Chrome or Edge browser tab (Google Cast) to share.
Note
To use this option, confirm the network is properly set up for Google Cast.
Use the SMART screen sharing client app for Windows.
Tip
Not sure which one you need? Learn about the options.
If the display has SMART Mirror installed as the screen sharing app, use smartmirror.link on the device to share its screen.
Reset the Wi-Fi chipset to try locating one of the open channels:
Turn Airplane mode on/off.
Turn Wi-Fi off and back on on the display and the device.
Try sharing your screen again. If the issue persists, contact SMART Support.
Before you contact SMART Support, learn about the information to include, and get a checklist to download and attach to your ticket.
Tip
To get the fastest support, include details about the troubleshooting steps you’ve tried. Copy the list below and edit the items as needed:
Updated all devices and apps.
Turned Airplane mode on/off.
Reset the Wi-Fi / network.
Verified that the display's network connection is working.
Connected successfully (or unsuccessfully) with a mobile hotspot.
You should also include how many displays were affected and which broadcasting devices were affected.
The screen share app has closed unexpectedly or stopped responding. Contact SMART Support for further assistance.
Before you contact SMART Support, learn about the information to include, and get a checklist to download and attach to your ticket.
Tip
To get the fastest support, include details about the troubleshooting steps you’ve tried. Copy the list below and edit the items as needed:
Updated all devices and apps.
Turned Airplane mode on/off.
Reset the Wi-Fi / network.
Verified that the display's network connection is working.
Connected successfully (or unsuccessfully) with a mobile hotspot.
You should also include how many displays were affected and which broadcasting devices were affected.
Screen sharing is typically intended for short to medium periods of use, such as for remote meetings or collaborative work sessions.
The length of time you can use screen sharing depends on a number of factors, including the specific technology and devices being used, the quality of the network, bandwidth, and the content being shared.
Thank you for using this troubleshooting wizard.
Help us improve! Let us know if you found this troubleshooting helpful or if there’s something we’ve missed.