# Trouble Shooting
## Spatial Reality Display Settings
### The camera view window's frame rate is too low
- Make sure USB cable is connected with host PC via USB 3.2 when ELF-SR1 is connected.
- Try the following steps.
- Unplug the power cable from Spatial Reality Display
- Unplug USB cable from the host PC
- Wait for a few seconds
- Plug the USB cable into the host PC
- Plug the power cable into Spatial Reality Display and turn it on
### An error dialogue appears
- Device not found
![Device not found](img/srd_settings_device_not_found.webp)
- This message will appear if the Spatial Reality Display is not connected.
- Make sure the Spatial Reality Display is connected to your computer via USB and display cables.
See for the details: [User Guide](../download/pdf/).
- Device lost
![Device lost](img/srd_settings_device_lost.webp)
- This message will appear if the Spatial Reality Display is disconnected while running the Spatial Reality Display Settings app.
- Reconnect the Spatial Reality Display to your computer, then restart the Spatial Reality Display Settings app.
- Session Error
![Session Error](img/srd_settings_session_error.webp)
- This message will appear if another app that uses the system is running when the Spatial Reality Display Settings app is launched.
- Two applications that use the system cannot run simultaneously.
## Firmware Update for ELF-SR2
### The screen message does not appear even if the USB flash drive is inserted into the UPDATE connector
- After removing the USB flash drive, turn off the power of Spatial Reality Display and try the Update operation again.
- Make sure that the update file is located in the root folder of the USB flash drive.
- Make sure that the USB flash drive is formatted with FAT32.
### No message appears and the screen turns dark even if the USB flash drive is inserted
- Make sure that Spatial Reality Display and the PC are connected properly with the USB cable.
- Remove the USB flash drive, turn off Spatial Reality Display, and try the Update again.
### The message displayed when the USB flash drive was inserted disappeared
- Press the - button while the message is displayed to turn it off.
- To display the message again, remove the USB flash drive and then insert the USB flash drive again.
## Firmware Updater for ELF-SR1
### Spatial Reality Display does not turn on after Firmware Update(ELF-SR1)
The update process may have failed.
Make sure the AC Adapter of the Spatial Reality Display is plugged in, connect it to the PC with the HDMI / USB cable, and then run the firmware updater again.