Question : Problem: Checksum error

Error message reads:
Warning-CMOS checksum invalid-Run SCU
Fatal-ROM checksum incorrect
Question,what is SCU?,is this fixable?

Answer : Problem: Checksum error

If the SCU isn't on a floppy, there is probably a key sequence you can press during boot.  Typically pressing Delete or F1 during boot will take you to the CMOS configuration screen.