I have the Transformer Infinity purchased in Taiwan.
When I plug a display device into the HDMI Port, the HDMI port is recognised on the tablet and on the display device, but no output on the display (all black).
The HDMI cable supports HDMI 1.3 (Acer Branded)
My friend has another Transformer Infinity purchased in Australia.
When he plugs his TF into the same display device using the same cable, the tablet screen is copied onto the display and it works fine.
I contacted Asus Support (Taiwan) vai the website. They referred me to 'Local Support'. The Local support guy asked me to plug the HDMI connector in and out of the tablet a few times (no effect) and in the end just told me to Factory Reset the device. I am unwilling to do that without some kind of assurance that I can recover the lost setup and also that the reset will be effective.
Reason in favour of Factory Reset might be that some software installed conflicts with the HDMI display.
However if this happens to be a hardware problem then factory reset will not fix the problem.
Does anyone else have experience of this problem with HDMI and can suggest avenue of fixing it or a way to determine the actual problem.