I tried alternate extra.lmza using OSFMOUNT (by renaming original extra.lmza to extra.lmza.bak and copying downloaded extra.lmza to the same folder) but still no joy. This time message displays for a few seconds and system reboots and this process repeats. I also tried converting UBS from GPT to MBR and vice versa with other boot loader too, still no success. There are too many combinations to try. I think the best option is use serial port.
I do see LPC (Low Pin Count) connector on F2-220, but I don't know the pin layout. I do have USB to serial converter and I can use it with putty as console. If LPC connector can be used for this purpose I'd love to give this a try.
Any knows if LPC can be used with serial console? Also, pin layout for PLC connector. I think all I need is GND, TX and RX pins for serial console.