Quote Originally Posted by Butters View Post
Once the flash starts properly the device will hold in preboot until it finishes.
Do you mean that once I see the loader initiated on the screen I no longer need to be holding the power button? Should it enter preboot mode automatically after the first phase and subsequent restart without me holding the power button and forcing it into preboot again?

Does it matter how the preboot mode is entered? I realized I can enter preboot just using the power button. USB cable can be inserted any time afterwards. The unit remains in preboot for about 18 seconds. Also, once the first flashing phase is initiated, I no longer need to be pressing the power button but then the restart happens quickly and timing differs on each attempt. Generally there is very little time to start pressing the power button again to force it into preboot after restart. Pressing the power button with loader active just turns off the device which then starts again because the USB cable is connected.

I do not know if this could make any difference. I did most of my attempts holding the power button all the time.

Quote Originally Posted by Butters View Post
First let's see if it can read from and write to the SD card.
I tried your SD card file but I did not find any log file. I think that during the booting process the unit does not get to a point where it reads from SD card before the loader is initiated.