audio disabled totally on hdmi connection

I was attempting a passive splitter when suddenly audio went to total failure. Pix seems normal.
Is a repair easily accomplished, or is motherboard failed.
And , What is likely to have caused my problem?

I get audio now from the av connector. And, is pix likely affected in a minor way since the:"accident"?

Thanks to the experts.

audio disabled totally on hdmi connection

audio disabled totally on hdmi connection

I was attempting a passive splitter when suddenly audio went to total failure. Pix seems normal.
Is a repair easily accomplished, or is motherboard failed.
And , What is likely to have caused my problem?

I get audio now from the av connector. And, is pix likely affected in a minor way since the:"accident"?

Thanks to the experts.

audio disabled totally on hdmi connection