mega 2560 wont bootloade??

so my arduino mega han gone faulty in the bootloader and am trying to upload a new one whith another mega 2560 and i keep getting messege when the burn of bootloader fails: avrdude: verification error, first mismatch at byte 0x1e000 0xff != 0x0d avrdude: verification error; content mismatch

i just did it on 5 arduino uno chips (atmega328p-pu) and it worked fine

do enyone have an idea of what is wrong seached on google meny have the problem but no one has an answer

Maybe bad wiring... Did you already tried to see if the avrdude can read the target chip signature? If you cant read his signature then uploading it's new firmware will always fail

the wireing isent the problem

and avrdud reads it