no uart output after nand erase clean

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1

I am new to the beagle board. I installed ubuntu, but wanted to use a
bigger SD afterwards. But after installation of ubuntu, I couldn't
boot from SD anymore. I connected the rs232 and issued a "nand erase
clean". After that, there is no response from the board anymore - not
a single character is being output to the uart, even if I push the
user button during reset.
I have the C4 beagle board.
Any ideas?

2

You just wiped out the program stored in NAND. To boot from the SD card you must hold the user button down during boot up. This forces a boot from the SD card. Otherwise it will boot from NAND.

Gerald

3

Yes, I know. But even I put all the files on SD, formatting done, MLO
first, u-boot.bin next and so on. Pressing the user button and then
holding it and connecting power. No single character comes out of the
UART.

4

Make sure that you format the card correctly and that the first file copied over to the SD card is the MLO file.

http://code.google.com/p/beagleboard/wiki/BeagleBoardDiagnosticsNext

Gerald

5

PMU_STAT is turned on by the SW. It means there is no SW running other than the boot ROM code…

Gerald

6

Thanks Gerald. I am new to this board and there is so much information
I have to gather. Thanks for your help.

7

You bet. Take a look and the System Manual to get a feel for the design and how it works. I think that will help you out.

Gerald