Table 1. POST Error Codes (continued)Code Description Action601 Diskette drive or controller error 1. Go to “IBM EnhancedDiagnostics program” onpage 92 and if possible run theIBM Enhanced Diagnosticsprogram.2. If the problem persists, have thecomputer serviced.602 Diskette IPL boot record not valid 1. The diskette might be defective.Try another diskette.2. If the problem persists, have thecomputer serviced.604 Unsupported diskette driveinstalled1. Go to “IBM EnhancedDiagnostics program” onpage 92 and if possible run theIBM Enhanced Diagnosticsprogram.2. If the problem persists, have thecomputer serviced.605 Diskette unlocked problem Have the computer serviced.662 Diskette drive configuration error 1. Go to the configurationprocedure and follow theinstructions to verify thediskette drive configuration.2. Run diagnostics on the diskettedrive. See “IBM EnhancedDiagnostics program” onpage 92.3. If the problem persists, have thecomputer serviced.762 Math coprocessor configurationerrorHave the computer serviced.11xx Serial port error (xx = serial portnumber)Have the computer serviced.1762 Hard disk configuration error 1. Go to “Chapter 4. Using theConfiguration/Setup Utilityprogram” on page 29 and followthe instructions to verify thehard disk configuration.2. If the problem persists, have thecomputer serviced.74 User Guide