after executing by mistake 'nand write . Kernel 0 $(filesize)' with Zero before file size, u-boot broke the hardware The command I suppose flashed the kernel binary at offset '0' in NAND memory. As the result, the board is not booting anymore. Nothing is send out to serial port; pressing 's' button at power-up didn't work. looks like the board is dead.
Is there any way of unbricking the board? Is NBOOT is accessable somehow?