Chapter 6. Troubleshooting 454. Did the IBM Setup Utility program start automatically after the errormessage was displayed?No - Follow the action for this error message described in “POST error codes”on page 45.Yes - continue to step 5.5. Have you recently added, removed, or changed any hardware?No - Have the computer serviced.Yes - Do one of the following:• If the failure occurred immediately after you installed or removed anoption, and you have not yet updated the configuration, see Chapter 4,“Using the IBM Setup Utility program,” on page 27.• If the computer was functioning correctly after you installed an optionand is now malfunctioning, have the computer serviced.• If the failure occurred immediately after you made a change to theconfiguration, verify that you selected the correct settings.Power-on self-test (POST)Each time you turn on your computer, it automatically performs a series of teststhat check the basic operation of the base computer. This series of tests is calledthe power-on self-test (POST).POST does the following:• Checks basic system board operations• Checks the memory operation• Compares the current system configuration with that established by the IBMSetup Utility program• Starts the video operation• Verifies that the diskette drives are working• Verifies that the hard disk drive and the optical drive are workingPOST error codes are displayed when POST detects problems with or changes tothe hardware configuration during startup. POST error messages are 3-, 4-, 5-, 8-,or 12-character alphanumeric messages and include brief explanations.POST error codesThe computer might display more than one error message. Often, the first error tooccur causes subsequent errors. When using the POST message charts in this
