Originally Posted by EpicFail236
I had a similar problem. Apparently, some MHL adapters (or it may be the device, i dunno) require you to have some power running to the device before the output will work. Try running your power cable into the adapter and see if it starts working.
As it from samsung MHL it requires samsung adapter, and i've already connected it to the power port. Which means the mhl is already powered.
Hmm, since samsung power adapter has less power output then the htc one(9v 1.67A), this could be the reason that the mhl(or the device) is under powered.
But seeing other thread, on using the other mhl adapter/connector, makes me wonder. Do I really need official mhl connector to be able to generate output which can be directly converted to analog, from the cable i am using right now?
Sound like i am taking to my self.