I am trying to debrick my router TpLink MR-3420 V2.2 through Serial connection. But I am getting garbled output. All the output from the start of the boot till below is garbled but a small part is properly visible.
[ 0.798806] console [ttyS0] enabled [ 0.798806] console [ttyS0] enabled [ 0.806364] bootconsole [early0] disabled [ 0.806364] bootconsole [early0] disabled [ 0.821544] m25p80 spi0.0: found s25sl032p, expected m25p80 [ 0.827387] m25p80 spi0.0: s25sl032p (4096 Kbytes) [ 0.833281] 5 tp-link partitions found on MTD device spi0.0 [ 0.839046] Creating 5 MTD partitions on "spi0.0": [ 0.844066] 0x000000000000-0x000000020000 : "u-boot" [ 0.850869] 0x000000020000-0x00000018273c : "kernel" [ 0.857949] 0x00000018273c-0x0000003f0000 : "rootfs" [ 0.865033] mtd: device 2 (rootfs) set to be root filesystem [ 0.870937] 1 squashfs-split partitions found on MTD device rootfs [ 0.877396] 0x000000390000-0x0000003f0000 : "rootfs_data" [ 0.884920] 0x0000003f0000-0x000000400000 : "art" [ 0.891711] 0x000000020000-0x0000003f0000 : "firmware" [ 0.900177] libphy: Fixed MDIO Bus: probed [ 0.923379] libphy: ag71xx_mdio: probed [ 1.553849] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.1:00 [uid=004dd0 42, driver=Generic PHY] [ 1.564132] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:MII [ 2.193641] ag71xx-mdio.1: Found an AR934X built-in switch [ 2.246052] eth1: Atheros AG71xx at 0xba000000, irq 5, mode:GMII [ 2.255050] NET: Registered protocol family 10 [ 2.264817] NET: Registered protocol family 17 [ 2.269488] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this. [ 2.283050] 8021q: 802.1Q VLAN Support v1.8 [ 2.289340] hctosys: unable to open rtc device (rtc0) [ 2.296888] squashfs: SQUASHFS error: unable to read id index table [ 2.303734] List of all partitions: [ 2.307361] 1f00 128 mtdblock0 [ 2.311503] (driver?) [ 2.313992] 1f01 1417 mtdblock1 [ 2.318133] (driver?) [ 2.320577] 1f02 2486 mtdblock2 [ 2.324722] (driver?) [ 2.327163] 1f03 384 mtdblock3 [ 2.331294] (driver?) [ 2.333753] 1f04 64 mtdblock4 [ 2.337889] (driver?) [ 2.340333] 1f05 3904 mtdblock5 [ 2.344478] (driver?) [ 2.346913] No filesystem could mount root, tried: [ 2.351779] squashfs [ 2.354124] [ 2.355674] Kernel panic - not syncing: VFS: Unable to mount root fs on unkno wn-block(31,2)
Another thing is that, the boot process doesn't recognize any input from the laptop, at the end when it says rebooting in 1 second...
If I type something at start of the boot when the output is garbled, it stops the boot but I have no idea how to perform the flash from there since no information can be read from there. I have properly soldered the RX TX and GND to the router board. I have also debricked another router TpLink W8960N so I have no idea what is going wrong here.
Can anyone help?