Hello Tony B3,
Thank you for posting in Microsoft Community.
I'm sorry to hear that you're having trouble with your ARM64 Windows 11 Developer Kit. Based on the information you provided, it seems that the device is not sending any signal to the monitor via the micro-HDMI port.
Since you have already verified that the cable and monitor are working properly, it's possible that there may be an issue with the device itself. I recommend contacting Microsoft support directly for further assistance with this issue. You can reach them through these steps:
- Go to Contact Us - Microsoft Support
- Choose how you would like to get support for your Surface device.3. Type in the problem you need help with.4. Look at any available solutions offered and select Contact Support. Here is a link you can check to know a detailed guide in reaching our live support: How to get Phone and Chat Support (for Surface Home/Consumer - Microsoft Community I wish you all the best and hoping you'll get a resolution there.Regards,Rolando S.