@erikescudero
Hi! Thank you for replying. Else i have been just staring at all the forums

The thing is, the printer has been working flawlessly for the past 6 years.
I have even checked the installed firmware hex files and the comparisons show that all of these have been loaded successfully.
Inference : the board is receiving the firmware.
But it just doesnt get out of the bootloader mode.
I even opened up the control unit, cleaned the board, checked for sticky buttons.. But nothing! I feel sad.