Yeah well, it is a sensitive area that you have to be careful.
There are lots of direct connections to the cpu, the making of a short circuit on one of the lines can be fatal.
That is why I mostly have given ohms measurements, and no vdc measurements of the sensitive lines.
But okay, maybe you are lucky and it's a diode issue.
But this you will see if you remove the diode chip, and measure the shorted line.
If it's still shorted it can be a damage of the cpu pin.
That is, if the hdmi connector pin doesn't make a short.