Right now when I connect the USB cable from the computer to the BBB, the 
user LEDS, as well as the power LED are lighting up as normal, and after 
about one minute, only the rightest LED flashes at the heart beat rate. The 
rest three user LEDs are not showing any light. And I cannot recognize the 
system (/boot disk) with my computer via USB cable. Help, please.

On Saturday, November 14, 2015 at 10:04:42 PM UTC-5, Henry Yongfan Men 
wrote:
>
> It seems that the BBB cannot be recognised by the computer (there is no 
> USB device recognised when I plug in the BBB with my computer, and no USB 
> disk showing as well) after I run the following sentence in uEnv.txt:
>
>
> optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G
>
> I haven't backed up the important data in the system. So I don't want to 
> simply wipe the eMMC with new images. Do you know how to save the file? 
> They are very important. Thanks.
>

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