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Does the round part on the top side of EX3 and EX4 light up when running measurements?

The round part on the top side of the sensor does not light up??when running measurements.

?EX4: red round part	EX3: white round part

These are ambient light sensor.

But ColorNavigator does not support Ambient light adjustment by using EX3 and EX4.

▼ Product Categories：ColorEdge FAQ ranking

No.	Question	Category	Date
1	How to Safely Disinfect and Clean EIZO Products (COVID-…▼ How to Safely Disinfect and Clean EIZO Products (COVID-19)	ColorEdge	June 24, 2025
2	Is it ok to setup the monitor on painted surface?	ColorEdge	January 20, 2015
3	When connecting Mac (2018 or later) to an monitor with …▼ When connecting Mac (2018 or later) to an monitor with DVI input, screen flicker occurs or no image displayed.	ColorEdge	July 31, 2020
4	Why doesn't the "Auto adjustment button"…▼ Why doesn't the "Auto adjustment button" work properly?	ColorEdge
5	There is a clicking noise coming from the monitor.	ColorEdge	January 7, 2022
6	Does the power ON/OFF operation shorten backlight life?	ColorEdge
7	Why EIZO software such as ScreenManager Pro or ColorNav…▼ Why EIZO software such as ScreenManager Pro or ColorNavigator cannot recognize the EIZO monitor connected to the USB 3.0 port of the PC?	ColorEdge	January 5, 2015
8	Monitor shows incorrect color and non-smooth tone when …▼ Monitor shows incorrect color and non-smooth tone when connecting Mac via HDMI cable.	ColorEdge	February 7, 2023
9	When monitor is connected to a PC via USB Type-C, the c…▼ When monitor is connected to a PC via USB Type-C, the communication speed of USB devices connected to a USB hub and the monitor built-in wired LAN slows down.	ColorEdge	February 17, 2023
10	The monitor connected via DisplayPort does not show any…▼ The monitor connected via DisplayPort does not show any image.	ColorEdge	August 21, 2015
11	I've been disconnected from the network connected …▼ I've been disconnected from the network connected via the LAN port of the monitor (macOS).	ColorEdge	December 6, 2022
12	Which chemicals are safe for disinfecting and cleaning …▼ Which chemicals are safe for disinfecting and cleaning monitors and accessories?	ColorEdge	April 17, 2025
13	I've been disconnected from the network connected …▼ I've been disconnected from the network connected via the LAN port of the monitor (Windows).	ColorEdge	July 15, 2022
14	EIZO software does not run or run slower under Windows …▼ EIZO software does not run or run slower under Windows 11.	ColorEdge	August 29, 2024
15	How do I properly plug in and unplug the USB Type-C cab…▼ How do I properly plug in and unplug the USB Type-C cable?	ColorEdge	September 13, 2024
16	In some applications, tone characteristics and the colo…▼ In some applications, tone characteristics and the color of the image are not displayed correctly causing low tones to appear lost.	ColorEdge	April 6, 2016
17	ColorNavigator Network Tutorial Videos	ColorEdge	January 16, 2025
18	Why the signal error is displayed and there are no imag…▼ Why the signal error is displayed and there are no image on the screen, when playing Blu-ray video on the player device connected via HDMI?	ColorEdge	March 10, 2016
19	How much difference is there between the electromagneti…▼ How much difference is there between the electromagnetic wave emissions of a CRT and that of a LCD?	ColorEdge
20	ColorNavigator 7 language pack (zip file) automatically…▼ ColorNavigator 7 language pack (zip file) automatically extracted when downloaded.	ColorEdge	March 22, 2019

▼ Product Categories：ColorEdge Latest updates

No.	Question	Category	Date
1	ColorNavigator Network Tutorial Videos	ColorEdge	January 16, 2025
2	How do I properly plug in and unplug the USB Type-C cab…▼ How do I properly plug in and unplug the USB Type-C cable?	ColorEdge	September 13, 2024
3	EIZO software does not run or run slower under Windows …▼ EIZO software does not run or run slower under Windows 11.	ColorEdge	August 29, 2024
4	When monitor is connected to a PC via USB Type-C, the c…▼ When monitor is connected to a PC via USB Type-C, the communication speed of USB devices connected to a USB hub and the monitor built-in wired LAN slows down.	ColorEdge	February 17, 2023
5	When using the HDR supported ColorEdge, the color appea…▼ When using the HDR supported ColorEdge, the color appears washed out or extremely overexposed / bright.	ColorEdge	January 12, 2023
6	There is a clicking noise coming from the monitor.	ColorEdge	January 7, 2022
7	I've been disconnected from the network connected …▼ I've been disconnected from the network connected via the LAN port of the monitor (Windows).	ColorEdge	July 15, 2022
8	I've been disconnected from the network connected …▼ I've been disconnected from the network connected via the LAN port of the monitor (macOS).	ColorEdge	December 6, 2022
9	When connecting Mac (2018 or later) to an monitor with …▼ When connecting Mac (2018 or later) to an monitor with DVI input, screen flicker occurs or no image displayed.	ColorEdge	July 31, 2020
10	How to Safely Disinfect and Clean EIZO Products (COVID-…▼ How to Safely Disinfect and Clean EIZO Products (COVID-19)	ColorEdge	June 24, 2025
11	Which chemicals are safe for disinfecting and cleaning …▼ Which chemicals are safe for disinfecting and cleaning monitors and accessories?	ColorEdge	April 17, 2025
12	Does the round part on the top side of EX3 and EX4 ligh…▼ Does the round part on the top side of EX3 and EX4 light up when running measurements?	ColorEdge	August 2, 2019
13	ColorNavigator 7 language pack (zip file) automatically…▼ ColorNavigator 7 language pack (zip file) automatically extracted when downloaded.	ColorEdge	March 22, 2019
14	When using ColorEdge calibrated by ColorNavigator 6 and…▼ When using ColorEdge calibrated by ColorNavigator 6 and Chrome version.68 or later, colors not displayed correctly.	ColorEdge	February 21, 2019
15	RGB high tones (Especially green) are lost when HDMI co…▼ RGB high tones (Especially green) are lost when HDMI connection used on the CG3145 / CG319X.	ColorEdge	June 28, 2018
16	In some applications, tone characteristics and the colo…▼ In some applications, tone characteristics and the color of the image are not displayed correctly causing low tones to appear lost.	ColorEdge	April 6, 2016
17	Why the signal error is displayed and there are no imag…▼ Why the signal error is displayed and there are no image on the screen, when playing Blu-ray video on the player device connected via HDMI?	ColorEdge	March 10, 2016
18	The monitor connected via DisplayPort does not show any…▼ The monitor connected via DisplayPort does not show any image.	ColorEdge	August 21, 2015
19	Can I use the monitor in environment with corrosive gas…▼ Can I use the monitor in environment with corrosive gas?	ColorEdge	June 11, 2015
20	Why doesn't ColorNavigator Ver.5 start in multi-m…▼ Why doesn't ColorNavigator Ver.5 start in multi-monitor environment?	ColorEdge	May 1, 2015

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