Hardware - My Barcode Scanner isn't Working

Written By Ascend knowledge base (Administrator)

Updated at August 12th, 2025

Supported Scanner Models

Check out our Hardware - Requirements article for specific models supported by Ascend.

 

If the scanner is not scanning at the register

If the scanner is not scanning at the register - giving bad beeps or not beeping at all - the scan window might be dirty. To clean it, grab a washcloth. 

  • Make sure the washcloth is a clean and soft material; you don't want to wipe your scanner with a rough or abrasive material.
  • Dampen the washcloth with gentle dish soap and water. Then wipe down the scan window. 

If that doesn't work, recalibrate the scanner:

  1. Go to AscendRMS.com and log in.
  2. From the Retailer PortalUS Downloads > Installers & Drivers.
  3. Navigate to the calibration sheet for you scanner model.
  4. Download or Download/Print the correct calibration sheet.
    1. For models: DS4308, DS4608, and DS1878 you can save paper and scan the QR code right on your computer screen.
    2. For models: LS2208 and LS4278 you will need to download and print out the calibration sheet to scan.
      1. Scan the sheet, starting at one.
        Photo of a hand holding a scanner pointed at 3 barcodes

If you have a LS4278 cordless scanner, and that didn't do the trick, you may need to re-activate the scanner for sales.

  1. Go to AscendRMS.com and log in.
  2. From the Retailer PortalUS Downloads > Installers & Drivers.
  3. Navigate to the Symbol LS4278 Activation barcodes sheet.
  4. Download and print the sheet.
  5. Scan the sheet, starting at one.

If the scanner won't turn on

If the scanner won't turn on or a cordless scanner doesn't appear to be charging, the first thing you should do is check the hardware. The cradle should have a steady green light.

The cordless scanner should beep when set in the cradle and have a blinking green light when it's charging.

If you don't see those signs of a connection, make sure the cradle is correctly hooked to the power and the cordless scanner is fully cradled. If the cradle is plugged in but still isn't connected, try plugging it into a different USB port on the computer.

If the cordless scanner won't scan from a distance

If your cordless scanner stops working while scanning items in a different area of your shop, you may be too far away from the cradle, or the signal might be blocked by steel, concrete, or Bluetooth devices.

Bring the scanner back towards the cradle. If it still doesn't work when you're by the cradle, scan the barcode where the scanner face rests on the cradle to reconnect them.

Additional Resources

KB22-163