The Broadcom chip tends to run very hot. If you think that your adapter is drawing too much current, you can wire an ammeter into the power supply for it- it should be drawing something like 300 mA of current.
There are three LEDs on the ROV controller board that indicate the status of the controller board homeplug adapter- they are the three left-most LEDs, colored green, amber, and amber. What are they indicating?
If your topside adapter is showing only the outer two LEDs, then its likely that there is nothing wrong with it, just for some reason the box is not connecting to the adapter on the ROV controller board.