Please don't skip any step if you want to recover your bricked Archer C6 router.
What's working
power Led is on, router acting as simple switch and nothing working
What's i do now
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Install solarwind tftp server : FREE TFTP Server and SFTP/SCP Server | SolarWinds
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Download stock firmware : TP-Link Archer C6 V2 - Revert to Stock firmware from OpenWRT - Home Network Community
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Get a 10/100mbps switch, router(lan 1) port --~-- switch port and switch port --~-- laptop port
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Assign static ip on laptop:
ip : 192.168.0.66
subnet : 255.255.255.0
leave other blanks -
Rename stock firmware to ArcherC6v2_tp_recovery.bin and paste into C:\TFTP-Root folder
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Connect power cable to router (don't switch on)
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Disable all firewall by win+r and write ncpa.cpl cmd.
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Start tftp server, now press reset button and power on until lock(wps) LED glow ups
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Wait ~120s, Voila you get your stock firmware back