Hi!
Today I have using beagle bone as normal (connected through USB). But suddenly the beaglebone turned off and when I connect it (usb or 5v input) only the led PWR flash once but nothing else happens. Only uart1_tx (rx was not) and ground were connected to other device (arduino) so I think that I could not fry the board.
Is the board died?
Thank you
And another one…
Gerald
This is not a common issue, but it is one we have seen a few times before.
File an RMA and let them worj with you and try to figure out what is going on.
http://beagleboard.org/support/rma
What revision board is it?
Gerald
Does the power LED flash when you plug it in?
Gerald
Yes, it flashes once and then turns off.
Filipp.
You will need to do an RMA.
Gerald
Add me to the list of people of experienced this behavior. I will file an RMA.
Gerald,
Does this issue happens just with UART1 or with any UART ?
I just changed my design from UART2 to UART1 and wonders if UART2 is a safer bet.
This issue has nothining to do with any uart.
Gerald
Hi!
I have a similar problem, but now the beaglebone does not do anything (powering by usb or adpater)
The last thing I did was use pin p9_5 (VDD_5V). The other time I did exactly the same so I think there could be any relation.
I use a lipo battery connected to a BEC and the BEC output connected to the pin p9_5 (VCC) and pin p9_1 (GROUND). BeagleBone worked perfectly but
when I switched it off (and disconnected from BEC) and connect by USB it never turn on again.
My BEC works perfectly, I used it to power the beaglebone using the dc input for a lot of time without having any issue.
The reason for using these pins instead of DC input is only for reasons of space.
When I connect the adapter I have 5V in the pin p9_5 but no led flash.
Thank you
2012/8/6 Gerald Coley <gerald@beagleboard.org>
Not exactly sure what the issue could be. You may need to send it in to have it looked at.
Gerald
i too have this same problem. Filed a RMA already, will be sending it but facing problems in sending the courier from India. got it returned back from airport.!!
what shõud i do?
Contact the RMA team and they can help you get your paper work in line. Or, return it to your in country supplier for a replacement. If you bought it from outside of India, then the first suggestion is the best path to take.
Gerald
Most likely there is a short in the processor. When the LED flashes that means the PMIC has detected an over current condition on power up and has shutdown. What sort of voltage did you have on the UART1 signals?
Gerald
Well, glad you showed me. The maximum voltage is 3.3V on the processor. From what you told me you powered the MAX232 with 5V. That means the signal to the processor is 5V. You blew up the processor. Next time I suggest you run the MAX232 at 3.3V
Gerald
You need to request an RMA and have the processor replaced, unless you want to buy a processor from a distributor and try and replace it yourself.
http://beagleboard.org/support/rma
Gerald
Hi Gerald,
We need your help in how can we use UART1 in beaglebone for serial communication with PC.
In previous post you have asked me to power up MAX232 IC with 3.3V . But i’m not sure whether it can work with 3.3V after reference with this link.
http://www.engineersgarage.com/electronic-components/max232-datasheet . It is said that its supply voltage is 5V (4.5 - 5.5V) , so please tell us what supply voltage should i use. If its true that MAX232 works on 5V , tell us how we can step it down to take it to the processor .
It would be highly appreciated if you guide us on the complete steps on how we can connect UART1 of beaglebone to PC , so that we can avoid any mess with the new beaglebone .
Our goal was to boot the kernel from UART1 and see it on minicom , where u-boot still remains in UART0.
Thanks in advance ,
Dhiv 
1. In previous post you have asked me to power up MAX232 IC with
3.3V . But i'm not sure whether it can work with 3.3V after reference
with this link.
http://www.engineersgarage.com/electronic-components/max232-datasheet .
It is said that its supply voltage is 5V (4.5 - 5.5V) , so please
tell us what supply voltage should i use. If its true that MAX232
works on 5V , tell us how we can step it down to take it to the
processor .
Give this [1] a try instead of a MAX232 if you need to power from
3.3V and use 3.3V logic levels. It works well for my bones.
[1]: http://www.linear.com/product/LTC2803
2. It would be highly appreciated if you guide us on the complete
steps on how we can connect UART1 of beaglebone to PC , so that we
can avoid any mess with the new beaglebone .3. Our goal was to boot the kernel from UART1 and see it on minicom ,
where u-boot still remains in UART0.
To use UART1 for Linux, simply set your "console=" boot arg to be ttyO1
instead of ttyO0, then spawn a getty (or similar login manager) on
ttyO1. You may also need to ensure /etc/securetty (or similar) allows
use of that tty within Linux.
-Andrew
Can you copy the circuitry used on the BeagleBoard-xm? It is on page 8 of the schematic. The device runs at 3.3V and connect it direct to the expansion headers. Very simple to do. You do not need the level shifter because 3.3V is what the board uses.
http://circuitco.com/support/index.php?title=BeagleBoard-xM
Gerald