BenQ PD2725U DesignVue Designer 27" 16:9 HDR 4K IPS Monitor - Manual (Page 80)

80 Troubleshooting
Thunderbolt™ 3 connection (models with Thunderbolt™ 3 ports)
KVM Switch
USB-C™ connection (models with USB-C™ ports)
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When single monitor is connected, no video or audio output from the laptop with
Thunderbolt™ 3 connection.
Check the cable connections and menu settings in the following order.
• Check if an appropriate cable has been connected to the monitor and the laptop properly.
See Connectivity of Thunderbolt™ 3 port on your monitor (PD2720U / PD2725U /
PD3220U only) on page 20 for more information.
• Check if the input source has been selected to Thunderbolt 3 from Input > Signal Input .
• Check if it is either Thunderbolt™ 3 port or USB-C™ port used on the computer for
connection. If a USB-C™ port is used, make sure the port supports video signal
transmission.
No response after selecting KVM Switch > USB Upstream .
Check the cable connections and menu settings in the following order.
• Check if an appropriate cable has been connected to the monitor and the second video
source properly. See Connect the PC video cable. on page 26 for more information.
• Check if the input source has been selected to the second video input from KVM Switch >
Video Input .
No video or audio output from the laptop with USB-C™ connection.
Check the cable connections and menu settings in the following order.
• Check if the USB-C™ cable has been connected to the monitor and the laptop properly. See
Connect the PC video cable. on page 26 for more information.
• Check if the input source has been selected to USB-C on Input > Signal Input .