Archer c20 v5 (ISP) (RU) troubles with boot

Hi guys.I have this problem ...

There is a router tp-link AC750 Archer c20(ISP) v5.0
After reflashing by openwrt

dd if=/dev/zero of=tp_recovery.bin bs=196608 count=1
dd if=tpl.bin of=tmp.bin bs=131584 count=1
dd if=tmp.bin of=boot.bin bs=512 skip=1
cat boot.bin >> tp_recovery.bin
cat owrt.bin >> tp_recovery.bin

The power light is on when I reboot and that's it
tried to load this https://github.com/ashegoulding/openwrt/releases/tag/v19.07.7-tl_archer_c20v5
i tried installing the stock firmware but it didn't help either
help pls

Which file from that website did you flash (as your instructions above don't say)?

I first used this file https://downloads.openwrt.org/releases/21.02.1/targets/ramips/mt76x8/openwrt-21.02.1-ramips-mt76x8-tplink_archer-c20-v5-squashfs-sysupgrade.bin

Then I tried to restore from openwrt-19.07.3-ramips-mt76x8-tplink_c20-v5-squashfs-tftp-recovery.bin

The question was not quite logically resolved. I tried installing the image for v4 , and everything ran

Your router is V4 or 5?! If your answer is Archer C20 V5, Did you upload and install OpenWRT Image (for Archer C20 V4) to your router?!!!

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