703N 更新了官方固件之后无法刷openwrt

liuhui1987812

Tp-link 703N是13年京东上买的，就想着升级下官方固件，升级了官方固件之后发现信号比较弱，想着刷下openwrt,但是进入路由器的配置界面进行刷openwrt发现提示版本不对，我想着可能是因为升级了tp-link的官方固件的原因，那么就试着ttl的方式来刷机，这种方式能刷进去，但是进不了系统，卡在这里

[    1.440000] 802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com>
[    1.440000] All bugs added by David S. Miller <davem@redhat.com>
[    1.450000] VFS: Cannot open root device "(null)" or unknown-block(0,0)
[    1.460000] Please append a correct "root=" boot option; here are the available partitions:
[    1.460000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

如果输原厂固件，比较老的那种，估计是我当时购买时的路由器固件，发现时可以的。同时我发现u-boot的版本也不对，
查看的版本是，我猜测是升级官方固件的时候u-boot也升级了导致不能刷openwrt。
现在就想问下有什么方法来刷openwrt？？谢谢大家
U-Boot 1.1.4-gd0be0bfd (Jan 20 2014 - 15:34:33)

AP121 (ar9330) U-boot

DRAM:  32 MB
led turning on for 1s...
id read 0x100000ff
flash size 4194304, sector count = 64
Flash:  4 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
ag7240_phy_setup
eth0 up
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
athrs26_reg_init_lan
ATHRS26: resetting s26
ATHRS26: s26 reset done
ag7240_phy_setup
eth1 up
eth0, eth1
Autobooting in 1 seconds