# ED-HMI3120-070C intermittently shows a white screen

**URL:** <https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562>\
**Category:** Industrial Automation and Control\
**Tags:** edatec, human-machine-interface-hmi, faqs\
**Created:** [August 26, 2026, 5:54am UTC](https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562 "2026-08-26T05:54:51Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![sding](https://avatars.discourse-cdn.com/v4/letter/s/3ab097/32.png) [@sding](https://forum.digikey.com/u/sding)\
**Post date:** [August 26, 2026, 5:54am UTC](https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562/1 "2026-08-26T05:54:51Z")

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Hi,

I recently purchased an **[ED-HMI3120-070C](https://www.digikey.com/en/products/filter/human-machine-interface-hmi/machine-interface/946?s=N4IgTCBcDaIKIBEC0AJAsgSQMwEYwAYl8B2fAYRAF0BfIA)**. The display works normally, but occasionally shows a completely white screen after the device is powered off and then turned on again.

Has anyone experienced a similar issue with this model? Could this be related to the LCD firmware, and is there a recommended way to update or fix it?

Thanks for any advice!

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**Author:** ![Irfan\_Koric](https://avatars.discourse-cdn.com/v4/letter/i/3d9bf3/32.png) [@Irfan\_Koric](https://forum.digikey.com/u/Irfan_Koric)\
**Post date:** [August 26, 2026, 1:29pm UTC](https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562/2 "2026-08-26T13:29:40Z")

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Hi sding,

Sorry, I’ve not heard of that issue with these. I’ll try to touch base with EDATEC and see what they say. I’ll get back to you here once I have some feedback from them. Otherwise, maybe someone on here has dealt with that issue and can help you in the mean time.

Regards.

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**Author:** ![Kristof\_2649](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/kristof_2649/32/2325_2.png) [@Kristof\_2649](https://forum.digikey.com/u/Kristof_2649)\
**Post date:** [August 26, 2026, 2:10pm UTC](https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562/3 "2026-08-26T14:10:52Z")

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I suspect what you’re experiencing is the boot time of the Rasbian Operating System on the Raspberry Pi that drives these screens

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**Author:** ![Irfan\_Koric](https://avatars.discourse-cdn.com/v4/letter/i/3d9bf3/32.png) [@Irfan\_Koric](https://forum.digikey.com/u/Irfan_Koric)\
**Post date:** [September 2, 2026, 1:26pm UTC](https://forum.digikey.com/t/ed-hmi3120-070c-intermittently-shows-a-white-screen/71562/4 "2026-09-02T13:26:01Z")

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Hello **[sding](https://forum.digikey.com/u/sding),**

I’ve had some response from the EDATEC on this as per the following:

Based on the current symptoms, this issue is very likely caused by a known MCU firmware anomaly — which has already been fixed in a recent version. The solutions are as follows (choose either one):

Send the device back to the manufacturer, for after-sales service.

If you have the capability to flash STM32, they can provide detailed firmware update steps and the necessary files.

In addition, to help further verify whether I²C communication is abnormal, you may perform the following temporary diagnosis (no hardware changes required):

Edit the /boot/cmdline.txt file and append the parameter at the end: trace\_event=i2c;

Save and restart the device;

Execute the following command to view the relevant logs:

sudo cat /sys/kernel/debug/tracing/trace | grep “i2c-10” | grep “a=027”

Hope that helps.