Hi @manikpj, I hope you're doing well. I saw on this post you'd successfully recovered your Linksys EA7500 v2 back to stock FW under @vuhuy's guidance using TFTP method with USB-TTL cable (image 1). I'm having problem with my router too. I created a new thread with details and my stuck work in it. Could you please follow it and give me some advices or instruction? Thank you very much.
My thread: https://forum.openwrt.org/t/is-my-linksys-ea7500-v2-bricked-please-help/192497