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My 4K monitor is flickering or blacked out when connected to the DisplayPort interface?
Last Modified: 3/29/2017      Last Modified by: LL   
Article ID:198

Summary:
The 4K monitor works properly when connected to a Thunderbolt 3 port but is flickering or blacked out when connected to the DisplayPort interface on the back of TS3/TS3 Lite.


Products Affected:   Thunderbolt Station 3 Lite [TS3 Lite], Thunderbolt Station 3 [TS3]

CalDigit Thunderbolt Station 3 (TS3) and Lite (TS3 Lite) are capable of outputting 4K video through the DisplayPort on the back, but the actual frequency (Hz) may vary. Certain monitors may be limited to 4K@30Hz when connecting through DisplayPort interface.
These monitors include but are not limited to the following models:

Asus PB287Q
Dell P2715Q, S2817Q, P2415Q
LG 31MU97C-B, 24UD58-B
Philips 288P6LJE
Viewsonic VX2475SMHL-4K

If you are unable to output 4K@60Hz video, please try the followings:

1. Disable DP 1.2 support using your monitorís menu, which will set the display to 4K@30Hz

Some Dell 4K monitors can be switched to DP 1.1 mode by following the steps described in the "Confirm the DisplayPort (DP) configuration of the display." section.
http://www.dell.com/support/article/us/en/19/SLN296015/EN

2. Connect the monitor using a high quality DisplayPort cable that is 1 meter or shorter.
3. Connect the monitor to the Thunderbolt 3 port using a USB-C to DisplayPort or USB-C to HDMI dongle for 4K@60hz.


Keywords : TS3, TS3 Lite