I have been successfully using BBB powered from the USB adapter until now.
I had to do some restart, and then the board won't power up (the PWR
led blinks once when I press the POWER
button, then it stays like that, off).
Now I can only start the board using an external power supply (5.0V
), and it seems that the board uses around ~0.8A
and up to ~1.1A
.
What can be wrong?
Why it isn't working now?
L.E. Also, I have noticed that the main chip (AM355
) gets very hot, I can't put my finger more than one second on it.
L.E.2. I don't have attached any relevant power-consuming devices to it, only a USB WiFi dongle.
L.E.3. Before restarting the board, I was trying to get a GPIO
pin working, the problem was that from the library I've used (BlackLib
) when I set one GPIO
pin to high
, it would only stay high
for around 10ms
, and then go low
again. So for solving what, I have used this tutorial. I only got to the part where I exported some pins to the /sys/class/gpio/export file, and then echoing 1
s and 0
s to the associated pin (with a LED connected it didn't work), then I rebooted the board and this problem started.
I don't see any hardware mistakes that I may have done, is it possible that this fault is software-related?
Best Answer
Part of the chip on your board is damaged, probably the GPIO pin you were playing with, but not necessarily. Maybe you shorted a pin next to it, or damaged an internal buffer - such issues are almost impossible to diagnose precisely. Here are the options you have: