Dell Large Frame Monitors Touch Screen Function Does Not Work

Summary: Information about fixing no touch functionality on Dell Large Frame Monitors (LFM) when multiple video inputs are plugged into the display.

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Symptoms

The touch functionaliy does not work when you have multiple video inputs connected to a Dell Large Frame Monitor and the firmware update will fail.

Affected Monitors:

  • P5524QT
  • P6524QT
  • P7524QT
  • P8624QT

Cause

When video inputs are plugged into the Dell Large Frame Monitor, you can only have one video input connected into the computer for the touch function to work properly. If you plug in two video inputs in from one computer, the touch function will not function. For multiple computers, each computer must be connected to the monitor with one HDMI or DisplayPort (DP) cable and one USB upstream cable.

Resolution

Video Input Sources and USB Pairing

Ensure to connect both the video input source cable and the USB upstream cable that matches the Table below. Example: if you connect HDMI 1 and USB 2, it will not have touch functionality.

Dell Large Frame Monitor Rear Input Example

Table

Input Sources USB Upstream Touch Function Works or Does Not
HDMI 1 (CEC) USB 1 ✔
HDMI 2 USB 2 ✔
HDMI 3 USB 3 ✔
DisplayPort (DP)
VGA

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Affected Products

Dell P5524QT, Dell P6524QT, Dell P7524QT, Dell P8624QT
Article Properties
Article Number: 000228000
Article Type: Solution
Last Modified: 16 Apr 2025
Version:  3
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