Dell OptiPlex 980 Service Manual

Also see for OptiPlex 980 - Desktop: Specifications Setup & features Technical guidebook Technical guidebook Administrator's guide

Contents

Power is off, light is blank.BlinkingAmberInitial state of light at power up.Indicates system has power, but the POWER_GOOD signal is not yet active.If the Hard Drive light is off, it is probable that the power supply needs to be replaced.If the Hard Drive light on, it is probable that an onboard regulator or VRM has failed. Look at the diagnosticlights for further information.SolidAmber Second state of the light at power up. Indicates the POWER_GOOD signal is active and it is probable that thepower supply is fine. Look at the diagnostic lights for further information.BlinkingGreen System is in a low power state, either S1 or S3. Look at the diagnostic lights to determine which state thesystem is in.SolidGreen System is in S0 state, the normal power state of a functioning machine.The BIOS will turn the light to this state to indicate it has started fetching op-codes.Beep CodesIf the monitor cannot display error messages during the POST, the computer may emit a series of beeps that identifies theproblem or that can help you identify a faulty component or assembly. The following table lists the beep codes that may begenerated during the POST. Most beep codes indicate a fatal error that prevents the computer from completing the bootroutine until the indicated condition is corrected.Code Cause1-1-2 Microprocessor register failure1-1-3 NVRAM1-1-4 ROM BIOS checksum failure1-2-1 Programmable interval timer1-2-2 DMA initialization failure1-2-3 DMA page register read/write failure1-3-1 through 2-4-4 DIMMs not being properly identified or used3-1-1 Slave DMA register failure3-1-2 Master DMA register failure3-1-3 Master interrupt mask register failure3-1-4 Slave interrupt mask register failure3-2-2 Interrupt vector loading failure3-2-4 Keyboard Controller Test failure3-3-1 NVRAM power loss3-3-2 NVRAM configuration3-3-4 Video Memory Test failure3-4-1 Screen initialization failure3-4-2 Screen retrace failure3-4-3 Search for video ROM failure