Most of time, when I trying to boot Arduino, it stuck at booting process in u-boot. I attaching the log from the YunSerialTerminal:
U-Boot 1.1.4-dirty (Apr 10 2014 - 15:12:15)
Arduino Yun (ar9331) U-boot
DRAM: 64 MB
Top of RAM usable for U-Boot at: 84000000
Reserving 142k for U-Boot at: 83fdc000
Reserving 192k for malloc() at: 83fac000
Reserving 44 Bytes for Board Info at: 83fabfd4
Reserving 36 Bytes for Global Data at: 83fabfb0
Reserving 128k for boot params() at: 83f8bfb0
Stack Pointer at: 83f8bf98
Now running in RAM - U-Boot at: 83fdc000
Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x18
flash size 16777216, sector count = 256
Flash: 16 MB
Using default environment
In: serial
Out: serial
Err: serial
Net: ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
: cfg1 0x5 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
eth0 up
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
athrs26_reg_init_lan
ATHRS26: resetting s26
ATHRS26: s26 reset done
eth1 up
eth0, eth1
Hit any key to stop autoboot: 4 0
ar7240> 2h??
After ar7240>, every time appears few random characters and any commands does not works. I think It's because Arduino somehow interrupt autoboot (It only show immediately Hit any key to stop autoboot: 4 0) . Approximately in 1 case of 30 Arduino start well (autobot process is not automatically interrupted). I bought it yesterday and only recorded a few sketches. Thank you.