MB Fault

i have facing a problem in diagnosing MB.HAVE you any idea about this information and what i can do now ?

DIAGMB:MB=0,TA=ALL; PART. EXEC’D

PROGRESS MESSAGE MMN:MB150-1000

TEST RESULT= BAD TESTED UNIT= MBL-0-3 FLN:MBUL-65

ERROR INFORMATION:

TEST BLOCK NO= H’0F

ADDITIONAL INFORMATION: H’00000000 00000000 00000000 00
H’00000000 00000000 00000000 00

END TEXT JOB 0965

DIAGMB:MB=0,TA=ALL; EXEC’D

RESULT = FAULTS DETECTED

END JOB 0965