DragonBoard 845c Android 13 HDMI Display not working

Newly purchased DragonBoard 845c board, dowloaded the latest available pre-build images (Android13) from the following link:

https://snapshots.linaro.org/96boards/dragonboard845c/linaro/aosp-master/

“adb devices”, “adb logcat” both comes up fine, however, no HDMI display. Tried different HDMI displays (both monitors and TV), all is black screen. Really appreciated if anyone can help out or advices. Thanks.