Try to Netinstall any other router, just to be sure that Netinstall is properly configured.
Use the Netinstall utility version 7.14 Stable to reinstall the device.
https://youtu.be/gzlLbIf3Dbk
Or try Netinstall on Linux:
https://www.youtube.com/watch?v=CiVwzHwQq_Y
Make sure to use the latest files from our download page when you do this procedure:
https://mikrotik.com/download
If you do not succeed, make sure that your Netinstall and computer configuration fits these prerequisites:
https://help.mikrotik.com/docs/display/ROS/Netinstall
There are two types of booters available for use: the regular booter and the backup booter. It's essential to verify both options.
- To use the Regular booter press the Reset button after a 1-2 second delay from when you power it on.
- To employ the backup booter, power OFF the device. Press the Reset button and power on your device (wait until the "USR" led is blinking then stable "On", and when the "USR" led is "Off" - release the Reset button) - the device is booting in bootp mode to reinstall RouterOS using Netinstall.