Using the Eval board with default settings without connecting to USB to Evaluation board .
Using HDMI input 1 and output from Output HDMI .
Input from PC HDMI -> EDID emulator (1600X1200) -> Evaluation board -> monitor
We see that the Temperature of ADV7842 at 45 degree and over we see that output at the monitor flickers and sometimes goes black (No input )
If we cool ADV7842 with cold spray we see that the evaluation board works properly (Less than 45 Degree)
Do you see the same at your end .