Gus,
As a potential way of isolating the fault, you can unplug the Raduino from the main board and run the Raduino from a USB port on your computer, or other 5 volt supply.? That would let you know if the display and Nano are OK.? If you do this, you do not need the controls connected to the 8 pin connector on the Raduino.? plug a microUSB cable into the Nano on the RAduino and into a PC or other USB 5 volt source.? The display should light up, and you should see the normal startup screen.? If I interpreted your description, you put the 12 v power to the volume control connections on the uBITX board.? That could have taken out the Nano on the Raduino, as there is a connection to the Nano for CW side tone.? The Nano does not like anything over 5v or under 0v relative to the common on the Nano.? Nano's are cheap, so no big deal if you need to replace it.? Just make sure that you get one WITHOUT the headers already soldered, as they need to go on the other side of the board to work in the uBITX.
If that does work, then the Raduino is Probably OK.
Going beyond that will depend on the test equipment that you have.
By the way, did you do the test in step two of the wire up instructions from HF Signals?
I would do that test to verify that the board is still operational.? Note that the Raduino is NOT installed when measuring the current.
73
Evan
AC9TU
