Router is bricked
yesterday I have successfully installed openwrt and I intended to use adblock feature directly on router. However, I wasn't really happy about the result since I was getting 4th of my normal speeds. This led me to the point that I tried getting the original firmware back onto it. The tftp method hasn't worked though. After hours of unsuccessfull attempts I tried to use the feature build into the openWRT to install different firmware using GUI and after clicking submit button the device after turning on just ligths up a power indicator and for few seconds a lock icon. There are no signs that It is in fact in recovery mode. I tried using Linux and getting some logs out of it but nothing shows up (not a single line). I used LAN 1 connection straight to my laptop and the interface's ip address was set to 192.168.0.66 with /24 subnet mask.
Can anyone give me some piece of advice or tell me if I am doing anything wrong?
Any answer is appreciated :)