This article explains common reasons why touch may not work or partially work on certain touchscreen devices and how to resolve the issue.

Symptoms:

• Touch not working at all

• Touch not working on parts of the screen

• Dead touch band on screen

• Lower, upper, right, or left portion of screen unresponsive

• Cannot touch one of the targets during alignment

Important:

• Ensure the touch cable is connected. On most newer Elo monitors, this will be a USB touch cable. Some older models use an RS232 DB-9 cable or may support both USB and RS232.

• Do not confuse the VGA cable with the touch connection. VGA is for video only and does not affect touch functionality.

If the touch cable is properly connected and you are still experiencing the above issues, continue with the following steps.

Common Causes & Solutions:

1. Debris or protective films on the glass

   • Elo monitors sometimes ship with a protective sheet or release liner on the front of the glass. This must be removed for touch to work correctly.

2. Items on the screen edge (zero-bezel monitors)

   • Placing stickers, labels, sticky notes, asset tags, ID tags, tape, or plastic cover sheets on the black border or glass edge can cause touch failures or partial touch response. Nothing should stick to the touchscreen glass.

3. After operating system upgrades

   • Users often apply ID stickers or asset tags to indicate a system upgrade. These can interfere with touch functionality. Remove any stickers or applied items from the glass to restore normal touch performance.

For more details on resolving touch issues, see our Knowledge Article HERE.

   
If anything is sticking to the glass, you must remove it, clean the glass of any left-over sticky residue, cycle power to the unit by removing the power cord for 30-seconds and then reconnecting. Then test the monitor again for proper touch.