Similar to the following
When we input DVI UXGA on HDMI 1 port and HDMI on the HDMI port 2 .
And run a software that generates chequered format from PC at UXGA we see the the temperature of the chip goes up to 90 C and then we find the PLL loses lock .
Please let me know with regards to this if you are see similar problem.
With best regards and wishes