Help with my asus tuf gaming b550m-plus wifi ii

[sawin]

The lastest days I could buy and mount my first PC. But during all testing and switch the components: I think that I made a wrong configuration in the Bios or something else because the behind panel conectors it's not working, and hence neither the HDMI. But the motherboard it's ok.

[Jiaszzz_ASUS]

Hello, @sawin 

May I ask if the HDMI output worked correctly when you initially built it, and now it's not functioning?
Could you specify whether you're using integrated graphics or a discrete GPU, and have you tried cross-testing with DP video output or another HDMI cable?
When there is no display output, does the computer still power on, and are the fans running?
Have you attempted to clear CMOS to eliminate display issues?
We recommend referring to the following FAQ for initial troubleshooting steps:
[Motherboard] Troubleshooting - No Power/No Boot/No Display
[LCD Monitor] Troubleshooting - No display after turning monitor ON
Additionally, if necessary, please consider updating the BIOS to the latest version 3405 released on January 8, 2024.

Thank you.