【求救】TP WR720N v3无法TTL修复

un***

入手一个全新WR720N，开机正常之后就web刷到openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-factory.bin，之后再看剩余空间太少，又升级openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin，玩了几天正常，但是就是无法自动挂载U盘，按照ipk的时候，可能把openwrt弄错乱了，大概是在安装block-exroot的时候，后来重启就无法连接了。
于是拆了壳，接了TTL，可是按网上大神们的办法，无法进入TTL界面的命令行，只有一些信息显示：
[    0.550000] bio: create slab <bio-0> at 0
[    0.560000] Switching to clocksource MIPS
[    0.560000] NET: Registered protocol family 2
[    0.570000] TCP established hash table entries: 512 (order: 0, 4096 bytes)
[    0.570000] TCP bind hash table entries: 512 (order: -1, 2048 bytes)
[    0.570000] TCP: Hash tables configured (established 512 bind 512)
[    0.580000] TCP: reno registered
[    0.580000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.590000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.600000] NET: Registered protocol family 1
[    0.620000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.620000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    0.630000] msgmni has been set to 56
[    0.640000] io scheduler noop registered
[    0.640000] io scheduler deadline registered (default)
[    0.640000] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[    0.660000] ar933x-uart: ttyATH0 at MMIO 0x18020000 (irq = 11) is a AR933X UART
[    0.660000] console [ttyATH0] enabled, bootconsole disabled
[    0.660000] console [ttyATH0] enabled, bootconsole disabled
[    0.680000] ath79-spi ath79-spi: master is unqueued, this is deprecated
[    0.680000] m25p80 spi0.0: found s25sl032p, expected m25p80
[    0.690000] m25p80 spi0.0: s25sl032p (4096 Kbytes)
[    0.690000] 5 tp-link partitions found on MTD device spi0.0
[    0.700000] Creating 5 MTD partitions on "spi0.0":
[    0.700000] 0x000000000000-0x000000020000 : "u-boot"
[    0.710000] 0x000000020000-0x000000122b50 : "kernel"
[    0.710000] mtd: partition "kernel" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    0.730000] 0x000000122b50-0x0000003f0000 : "rootfs"
[    0.730000] mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    0.750000] mtd: partition "rootfs" set to be root filesystem
[    0.750000] mtd: partition "rootfs_data" created automatically, ofs=0x2e0000, len=0x110000
[    0.760000] 0x0000002e0000-0x0000003f0000 : "rootfs_data"
[    0.770000] 0x0000003f0000-0x000000400000 : "art"
[    0.770000] 0x000000020000-0x0000003f0000 : "firmware"
[    0.790000] libphy: ag71xx_mdio: probed
[    0.800000] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:MII
[    1.350000] ag71xx ag71xx.0 eth0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd041, driver=Generic PHY]
[    1.360000] eth1: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
[    1.910000] eth1: Found an AR7240/AR9330 built-in switch
[    2.950000] TCP: cubic registered
[    2.950000] NET: Registered protocol family 17
[    2.950000] Bridge firewalling registered
[    2.960000] 8021q: 802.1Q VLAN Support v1.8
[    2.970000] VFS: Mounted root (squashfs filesystem) readonly on device 31:2.
[    2.980000] Freeing unused kernel memory: 216K (8033a000 - 80370000)
procd: Console is alive
procd: - watchdog -
[    5.060000] usbcore: registered new interface driver usbfs
[    5.070000] usbcore: registered new interface driver hub
[    5.070000] usbcore: registered new device driver usb
[    5.300000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.310000] ehci-platform: EHCI generic platform driver
[    5.310000] ehci-platform ehci-platform: EHCI Host Controller
[    5.320000] ehci-platform ehci-platform: new USB bus registered, assigned bus number 1
[    5.330000] ehci-platform ehci-platform: irq 3, io mem 0x1b000000
[    5.350000] ehci-platform ehci-platform: USB 2.0 started, EHCI 1.00
[    5.350000] hub 1-0:1.0: USB hub found
[    5.350000] hub 1-0:1.0: 1 port detected
[    5.420000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
procd: - preinit -
Press the [f] key and hit [enter] to enter failsafe mode
mount_root: jffs2 is ready
[    9.270000] jffs2: notice: (327) jffs2_build_xattr_subsystem: complete building xattr subsystem, 18 of xdatum (1 unchecked, 17 orphan) and 118 of xref (0 dead, 38 orphan) found.
procd: - early -
procd: - watchdog -
procd: - init -
Please press Enter to activate this console.
procd: - init complete -

请教该如何救？？？？？

myc***

刷不死uboot，重新刷！！！！！

un***

无法进入刷机模式，在启动界面按键没有响应，怀疑是USB转串口的线有问题，输入线有问题
找了一个台式机自带串口，接了一个DB9的串口线，终端打印出来全是乱码。。。
暂时没辙了

我真名***

看log，应该uboot还是好的，如果捣鼓过openwrt的设置之后，无法再连接上的话，多数是config的配置问题，尝试一下在通电的时候狂按reset，然后应当会见到led灯闪动的频率十分快，此时将你的电脑的ip设置为192.168.1.x ，用telnet连上192.168.1.1，然后输入firstboot，回车，这就能把config清空了，试一试吧

un***

按楼上WuKaoSh 兄的方法搞好了，又学到一招，非常感谢！

jhj***

按大神教导恢复了哈哈哈  还以为变砖了