H01647 - FALSE CPU ERROR CODE MBD061 WITH QAPLUS/2 SYMPTOM: IBM PC 300 Series 6577 and 6587 may intermittently exhibit a false CPU diagnostic error code when the System Board test is performed using QAPlus/2. The error code displayed is "MBD061." PROBLEM ISOLATION AIDS: The false error code is displayed when all of the System Board tests are selected in QAPlus/2. The error will occur when the CPU is tested. FIX: If the user suspects a system board problem exists, the IBM Personal Computer Diagnostic diskette (QAPlus/PRO) should be used to diagnose the failure. The IBM PC 300/700 Diagnostic diskette (QAPlus/PRO) is created by using the Diskette Factory included in the systems preloaded software. Perform the System Board diagnostic routines using QAPlus/PRO. If all of the system board tests pass, assume that the "MBD061" error indication under QAPlus/2 is false. If the test does fail in QAPlus/PRO, continue normal problem determination procedures. QAPlus/2 & QAPlus/PRO are trademarks of Diagsoft, Inc.