Hi there, I´ve a 493G and I want to do a factory reset.

I´m not able to see anything in the serial (115200 8n1 no flow control) port as well

I´ve tried joining reset pads with a screwdriver… but with no luck

Thanks in advance for any help!

You'll have to netinstall -

https://help.mikrotik.com/docs/display/ROS/Netinstall

Be warned though - it can take many frustrating attempts to get netinstall to work properly!