Hi Ken and others,
I am happy to report that my Aura HD is back alive.
After trying other suggestions about pressing buttons which were unsuccessful I had hooked up the battery to an external charger (prying the battery wires on the HD and soldering leads on it and also on a wall-socket battery-charger that was easily opened).
This did not seem to work. The multimeter showed 4 Volts on the battery so that was charged. I was at a loss. What to do?!
Then I wanted to remove the tape I had used isolating the leads I had soldered on the wires to be able to make a clean cut and disconnect the battery. As I had no idea how to release the connector. Then I accidentally pulled the connector from the mainboard.
It turns out you must not pull it out of the connector parallel to the mainboard but orthogonal to it. (when the screen is on the surface; screen facing down; pull/move the connector straight up).
I left it for a couple of days; pressing some buttons and combinations of it to make sure there was no charge left anywhere in the device.
Just now I put the connector back and activated the slide-button and o-la-la it came up!
Thank you all for the great work I am about to enjoy again after a little mishap.
I hope my experience is useful to somebody.
I wish you all a lovely day!
