TL-MR100 boot looping
Hi all, got an issue with a TL-MR100 router stuck in a boot loop, but first a bit of backstory.
We've been using these routers as a 4G failover WAN connection. But finding that these are occasionally 'falling over'. They lose their internet connection and can no longer access the web gui. Power-cycling or factory resetting the router also makes no difference - the symptoms are the same; no internet and cannot connect via web gui.
Strangely the router will still give out DHCP, and you can connect to the router via Telnet. But nothing else responds.
I've attempted to recover the router using the TFTP technique:
https://community.tp-link.com/en/home/forum/topic/81462
and flashed the current firmware on the TP-Link AU firmware page:
https://static.tp-link.com/2021/202103/20210315/TL-MR100(EU)_V1_210119.zip
The router looks to take the firmware via TFTP correctly, but when it restarts itself it enters into a boot-loop state.
Is the router completely bricked now? Or is there another specific firware version I should be flashing to the router?