Could you please try the following suggestions and let me know the results?

Step 1: Check the connection

● Please check the interface and charger to make sure they are clean.

● Please use a Power Delivery (PD) charger rated above 45W or the power supply provided by Steam Deck to power the dock.

● Check if the HDMI interface is secure; ensure that you have selected the correct display input on your TV or monitor.

● Please use an HDMI2.0 or HDMI2.1 standard video cable. Try selecting an HDMI cable with a length of less than 4 meters to maintain signal stability.

● Excessive transfers (such as through an HDMI Switch) can weaken the signal and result in no signal output. If you need to use an HDMI Switch, try an HDMI cable with both ends shorter than 2 meters. Avoid using any different video ports adapters (such as HDMI to DisplayPort)

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Step 2: Try another cable or device

● Please use another USB-C to USB-C 3.2 cable or above to connect the hub and the device to check if it works properly. Ensure that this USB-C 3.2 cable (transmission rate≥10 gpbs) is capable of transmitting video signals .

● Test with multiple HDMI cables. Attempt to directly connect the Steam Deck using HDMI to check if the cable is functioning normally.

● Try a different device to connect to the docking station (such as laptop, desktop, phone/tablet with display out capabilities).

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Step 3: Change settings and reset

● Adjust the external monitor to a suitable resolution/refresh rate or lower it. You can try adjusting it to 1080p@60Hz to see if it can display normally.

● To reset the dock, unplug both the Steam Deck and the dock completely, including power and monitor cables. Then, plug the cables back in.

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Step 4: Provide more information

● If the above troubleshooting steps are unsuccessful, please provide the brand and model of the devices you’re connecting.

● Please send us a video about your process of connecting the product.

● Can the HDMI interface output video normally when trying not to connect to a power source?

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If the above troubleshooting plan is not feasible, please tell us more information, and we will feedback it to the technical staff for targeted inspection.

Applying an anti-glare screen protector has no negative effect on etched glass.

Have you turned on the corresponding settings in your graphics card panel? :)

Please use a HDMI 2.1 cable to test it.

Yep, jsaux Silicone Protective Case fits the steamdeck oled.

There may be an incompatibility between HB0702 dock and eArc, may be a CEC blocker would help.