I'm not sure what I've done to my 280v, but I've done something...
I was testing out some MAME emulation, with the overclock function on on ADAM image 1.1. Then, I powered the device down properly. Then, I powered the device on but it got stuck on the initial loading screen (it has a progress bar and a logo). It remained firmly stuck like that for a few minutes. Since I was planning on upgrading to Adam 1.3, i just pulled out the flash card since I could not get the device to power down with the power or reset buttons.
After preparing the new image on a micro SD, I find the 280v unresponsive. The green LED is dimly lit and that does not change with holding the power or reset buttons. The screen is black at all times. When I disconnect the internal battery and plug it back in, the green LED immediately comes back on.
I have no idea what I've done here. Thoughts?