DISH POS Screen: common issues and troubleshooting (applicable to Sunmi Terminals T2s and D3)

Diaa Elhimdi Updated by Diaa Elhimdi

In case of hardware issues related to the Sunmi Terminal (Screen) T2s and D3, Here are some common issues users encounter with the T2s model, along with simple troubleshooting steps:

1. Touchscreen Unresponsiveness

  • Issue: The touchscreen may become unresponsive or lag, often due to software glitches or hardware wear.
  • Troubleshooting:
    • Restart the device to fix temporary software issues.
    • Check for any protective screen cover that might interfere with touch sensitivity.
    • Ensure the screen is clean; use a microfiber cloth to wipe away debris or smudges.
    • If the problem persists, consider a factory reset (after backing up data) as a last resort, as it may be caused by corrupted software.
    • Verify that the Access point is connected and is well exposed (not covered, not facing downwards)

2. Battery and Power Problems

Issue: The screen may not hold a charge or may not power on at all.

Troubleshooting Steps:

  1. Use the Original Charger
    Ensure you are using the original charger and cable that came with the device. Third-party chargers may not supply the correct power output and can cause charging issues.
  2. Inspect the Charging Setup
    • Check the charging cable and power adapter for any visible damage.
    • Try using a different power outlet to rule out outlet issues.
    • Make sure the charging port on the screen is clean and free of debris.
  3. Perform a Full Power Cycle
    • Locate the power adapter for the device.
    • Unplug the power cord from the adapter.
    • Confirm that the screen powers off completely.
    • Wait at least 15 seconds.
    • Plug the power cord back into the adapter.
    • Turn the screen back on using the power button.
  4. Check the Emergency Power Button
    If the screen still does not turn on, locate the emergency power button on the back of the screen. It is positioned behind a closed lid that must be carefully removed. Refer to the image below to identify the button once the lid is open.

If the screen powers through this button, the issue can be narrowned down to a button problem.

3. Slow Performance or Freezing

  • Issue: The device may slow down over time or freeze due to heavy usage or insufficient memory.
  • Troubleshooting:
  1. Clear cache and unnecessary data to free up memory.
  2. Check for any available system updates; outdated software can negatively impact performance.
  3. If running multiple applications, consider limiting to essential apps only to reduce memory load.
  4. In case any third party apps have been installed, please make sure to remove them, as the device is designed and optimized for a specific purpose/use case.
  5. Restart the device periodically to help manage memory usage.

4. Network Connectivity Issues

  • Issue: Difficulty connecting or frequent disconnections.
  • Troubleshooting:
    • Verify the correct IP address is set up in the POS APP.
    • in case WLAN is Active, please make sure to turn if off. The screen must be connected via Ethernet at all times.

When to Contact Support or Service Center

If you have followed all the troubleshooting steps and the issue persists, it may indicate a more serious hardware failure. In such cases, we recommend reaching out to Customer Support for assistance. If your hardware is still under warranty, we will take care of the replacement at no cost to you.

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