The 7-inch ED-HMI product exhibits an intermittent white screen issue after manual power-off and restart

1 Overview

Introducing the background and applicable scenarios of the intermittent white screen issue observed in the 7-inch ED-HMI product following a manual power-off and restart.

1.1 Background

Some users have reported that during normal operation of the 7-inch ED-HMI product, ​after manually power cycling the device (turning it off and on again)​, the screen intermittently displays a white screen (as shown in the image below). ​However, the device can still be accessed remotely via SSH, and external monitors connected via the HDMI interface function normally.

white-lcd-new

Through analysis and verification, our company has identified the ​root cause​ as a ​defect in the firmware of the LCD screen, which triggers the intermittent white screen issue.

1.2 Applicability

The 7-inch ED-HMI product includes:

  • ED-HMI2002-070C
  • ED-HMI2020-070C
  • ED-HMI2120-070C
  • ED-HMI2220-070C
  • ED-HMI3010-070C
  • ED-HMI3020-070C
  • ED-HMI3120-070C

2 Solution

To address the aforementioned white screen issue, our company supports resolution by ​upgrading the LCD screen firmware. If users encounter this white screen problem during operation of the 7-inch ED-HMI product, please contact our engineers for assistance.

TIP

  • ED-HMI products manufactured before May 16, 2025​ may be affected by the aforementioned white screen issue.
  • ED-HMI products manufactured after May 16, 2025​ have undergone firmware upgrades to resolve the white screen issue. If the ​first four digits of the product’s serial number (SN)​​ are ​greater than or equal to 2521​ (as highlighted in the red box in the image below), this indicates that the LCD firmware is the latest version and the white screen issue has been resolved.
7-inch-sn-new