
UNSOLVED
No HDMI after BIOS 1.14.2, downgrading to 1.12.1 solved it.
Dell XPS 15 9560
Updated to BIOS 1.14.2 and lost audio/video from HDMI output.
Downgraded to BIOS 1.12.1 and problem solved!
One side note though: during downgrading the installer said update failed.
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