Yes.i have problem with balance of outputs..right output sound is low and left is brillant than right..i use seperate outputs but same; all rights are low then lefts.i opened rear of KB and checked all sockets and sliders.but nothing happened...i will try to reinstall OS or first sound upgrade usb stick..i will make a record from kb than put in the web..you will hear the problem..anyway, have a solution for checksum error?