Hello
I’m trying to boot a new BBB with a 5V, 2A power supply…
It boots perfectly when connecting the power supply via mini-USB cable, but it won’t boot when powering over the DC jack with the same power supply.
Any hints why that may be? Weak power supply section?
The same power supply works perfectly with Raspberry Pi and Cubieboard with connected 300MB WLAN adapters.
What is the part number of the power supply?
Is it connected to the same ground as the rest of they system?
When plugged in, what is the measured voltage?
Gerald
Hi,
I got the same problem. When I plug in a 5V power supply one LED ligths up and goes off again. After that nothing happens.
When I plug in the USB cable (in addition to the 5V) the BBB starts booting.
Is this behavior normal?
@Gerald Coley
What is the part number of the power supply?
unknown. It’s 5V power supply from my phone.
Is it connected to the same ground as the rest of they system?
I suppose it’s done inside the BBB. Isn’t it?
When plugged in, what is the measured voltage?
+5V
Yes. It is normal when the board has been damaged. The PMIC is shutting down due to excess current on one of the rails.
Gerald
Could this be related to the “cheap” power supply?
Would it be better with a stable power supply or are you shure that the chip is gone?
It depends. try it with USB power and see if you get the same results. Unplug everything else from the board. Make sure you are looking at the power LED.
Gerald