Our laboratory to simulate Beaglebone black made a card, just use two am3358 chips, other peripherals and BBB use is the same, is now in the hands of the home-made board transplant system has a problem, if use debian7.4 version of system image to the homemade board of burning system, through the serial port output will be: Incorrect magic number (0 XFFFFFFFF) block in EEPROM, Could not get board ID, in addition to the 7.4 version of debian system mirror, other versions when burning serial port output,

Also tried not directly burned system image, burn u - first boot, according to the u - the boot, after the completion of the compilation method of compilation in BBB board can start successfully, but there is still no response on homemade boards, also tried a block read the EEPROM in the u - the boot source of commented out the code to compile u - the boot, but still no response,

Don't know in which direction the continue now, do you have to know the bosses to show just a little, thank you,,,