IBM A40I TYPE 2271 Hardware Maintenance Manual

Contents

Symptom/Error FRU/ActionNo beep during POST. 1. See “Undetermined problems” on page75.2. System Board3. Memory Module4. Any Adapter or Device5. Riser Card6. Power Cord7. Power SupplyPOST error codesEach time you power-on the system, it performs a series of tests that check theoperation of the system and some options. This series of tests is called thePower-On Self-Test, or POST. POST does the following operations.v Checks some basic system-board operationsv Checks the memory operationv Starts the video operationv Verifies that the diskette drive is workingv Verifies that the hard disk drive is workingIf the POST finishes without detecting any problems, a single beep sounds and thefirst screen of the operating system or application program appears.Note:Type 2271/6840/6841 computers default to come up quiet (no beep and no memory countand checkpoint code display) when no errors are detected by POST.To enable beep and memory count and checkpoint code display when a successful POSToccurs, do the following:1. Select Start Options in the Configuration/Setup Utility program (see “Setup Utilityprogram” on page 7).2. Set Power-On Self-Test to Enhanced.If the POST detects a problem, an error message appears on the screen. A singleproblem can cause several error messages to appear. When you correct the cause ofthe first error message, the other error messages probably will not appear on thescreen the next time you turn on the system.In the following index, X can represent any number.POST Error Code FRU/Action000SCSI Adapter not enabled 1. Verify adapter device and Bus Masterfields are enabled in PCI configurationprogram. See documentation shippedwith computer.02X 1. SCSI AdapterChapter 6. Symptom-to-FRU Index 59