[Baak]

Are you plugging the cable into the GPU or Motherboard? 4K30Hz hints to DisplayPort 1.2. Used quite a lot on motherboards.

[Baak]

Is there any other power source connected to the notebook?

[Baak]

Ok that’s clear, I don’t know what has been discussed with Wiktor, I’m just a passerby 🙂

When the power is connected, is there anything connected to the lower USB-C too (Pic A)?  If yes, disconnect that. Is the host connected as Pic B?

Pic A:

[img width='' height='']https://insights.club-3d.com/wp-content/uploads/2025/03/Screenshot-2025-03-25-140119.png[/img]

Pic B:

[img width='' height='']https://insights.club-3d.com/wp-content/uploads/2025/03/Screenshot-2025-03-25-140328.png[/img]

[Baak]

Sometimes there are powersaving settings enabled on USB ports from the source (laptops). Could you check and disable those?

[Baak]

Which dock, laptop, display? Does the dock do anything? USB peripherals work? Network works?

[Baak]

My assumption is that de monitor does something “weird” when connecting both USB-Cs. Can’t put my finger on it tho.
Highly doubt the cable is at fault.

[Baak]

Have you tried the joy stick on the back of the display to adjust input?

 

From the Manual, have you followed these steps?

Power Delivery – Further Information
Due to the VX1655-4K-OLED’s design please note:
•
The first connected device will be the main input signal.
•
When a Type C port recognizes an external device as a power adapter, it will only distribute the power. It will NOT display the input signal.
•
Only when one of the Type C ports is recognized as a power adapter can the other one deliver two-way power.
If a laptop is connected first to the VX1655-4K-OLED, then a mobile phone is connected second, the mobile phone’s battery will not be charged as neither Type C port recognizes the connection as being connected to a power adapter.
NOTE: If you want to display the mobile phone’s screen, you must unplug the Type C cable connected to the laptop.
If a mobile phone is connected first to the VX1655-4K-OLED, then a laptop is connected second, the mobile phone’s battery will be charged as one of the Type C ports is recognized as being connected to a power adapter.
NOTE: If you want to display the laptop screen, you must unplug the Type C cable connected to the mobile phone.
Due to the VX1655-4K-OLED’s design, do not connect two laptops or one laptop and a desktop computer at the same time. This can cause power distribution conflicts, resulting in flashing screens or the forced shutdown of the laptop(s).
NOTE:
•
If the laptop has a Type C port, please connect via Type C to the VX1655-4K-OLED.
•
Do not connect the other Type C port of the VX1655-4K-OLED to another laptop or desktop computer via Type A and HDMI at the same time.
•
If the laptop only has HDMI and Type A ports, please connect via HDMI and Type A to Type C to the VX1655-4K-OLED.
•
If the power output of the Type A port of the laptop is not greater than 20W, please use our power adapter to connect to the VX1655-4K-OLED.
•
Do not connect the other Type C port of the VX1655-4K-OLED to another laptop or desktop computer at the same time.

[Baak]

Is it this one?
https://www.viewsonic.com/global/products/lcd/VX1655-4K-OLED#specs
Does it work with the mini HDMI to HDMI cable?

Does the PC recognize any additional displays?

[Baak]

DP to USB-C does not provide power.

Did you connect any kind of power source to the portable monitor?

[Baak]

Sometimes there are powersaving settings enabled on USB ports from the source (laptops). Could you check and disable those?

[img width='' height='']https://insights.club-3d.com/wp-content/uploads/2025/01/PowerSave.jpg[/img]

[img width='' height='']https://insights.club-3d.com/wp-content/uploads/2025/01/powersettings.jpg[/img]

[Baak]

What happens if you use an HDMI 2.1 cable between NUC and TV?

Assuming you mean LG CX? This LG has 1 eARC HDMI input, is the CAC-1587 connected in this input?

[Baak]

Is the support not referring to your iGPU from the UHD630? That apparently only supports DP 1.2?

[Baak]

Does the Laptop also crash without the CSV-1564?

[Baak]

Are there any power saving settings on the USB ports?
Is the BIOS up to date?

[Baak]

I think the chromecast can not output 4K.
https://support.google.com/chromecast/answer/12578818?hl=en

[Author]

Posts