IBM Aptiva 2158 Hardware Maintenance Service

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34beeps, use “Table 2-2 BIOS Error Beeps List” on page 38 to diagnosesystem problems.4. If you did not receive any error message, look for a description of your errorsymptoms in “Table 2-3 Error Symptoms List” on page 41.IMPORTANT: Check all power supply voltages, switch, and jumper settingsbefore you replace the system board. Also check the power supplyvoltages if you have a “system no-power” condition.5. If you are unable to correct the problem by using the “BIOS Error Codes,Messages, And Beeps List” table and “Error Symptoms List” table, go to“Undetermined Problems” On page 63.Table 2-1 POST Error Codes and Messages ListNOTE: To diagnose a problem, first find the BIOS error messages or codes in leftcolumn. If directed to a check procedure, replace the FRU indicated in the checkprocedure. If no check procedure is indicated, the first Action/FRU listed in rightcolumn is the most likely cause.BIOS Error Codes, Messages Action/FRU0111I/O Parity ErrorISA adapter cardSystem board0127CPU Clock MismatchCheck CPU speed and system board DIPswitches.See “Machine Type 2158 System BoardJumpers and Connectors” on page 131and “Machine Type 2163 and 2164System Board Jumpers and Connectors”on page 135.System board0151Real Time Clock Error0161CMOS Battery Bad0162CMOS Checksum ErrorEnter BIOS Setup and load the defaultsettings.CMOS battery.System board.0162Equipment Configuration ErrorEnsure the system configuration set inBIOS Setup is correct. See “BIOS SetupUtility” on page 11.Enter BIOS Setup and load the defaultsettings.CMOS battery.System board.