Screen Message Probable Cause Recommended Action
303–Keyboard Controller Error I/O board keyboard controller.
CAUTION Disconnect AC power from the
workstation before reseating or replacing
components because there is power to the
system board even when the workstation is
powered down.
1. Reconnect keyboard with workstation
powered off.
2. Replace the system board.
304–Keyboard or System Unit
Error
Keyboard failure.
CAUTION Disconnect AC power from the
workstation before reseating or replacing
components because there is power to the
system board even when the workstation is
powered down.
1. Reconnect the keyboard to the powered-off
workstation.
2. Be sure that none of the keys are pressed or stuck.
3. Replace keyboard.
4. Replace system board.
510–Splash Screen Image
Corrupted
Splash Screen image has errors. Restore BIOS.
511–CPU Fan Not Detected Fan is not connected or it might have
malfunctioned.
1. Reseat fan cable.
2. Reseat the fan.
3. Replace the fan.
512–PCI 1 Fan Not Detected Fan is not connected or it might have
malfunctioned.
CAUTION Disconnect AC power from the
workstation before reseating or replacing
components because there is power to the
system board even when the workstation is
powered down.
1. Reseat PCI fan cable.
2. Replace PC1 fan.
513–Chassis Fan or Memory
Fan Not Detected
Memory or system fan is not
connected or it might have
malfunctioned.
CAUTION Disconnect AC power from the
workstation before reseating or replacing
components because there is power to the
system board even when the workstation is
powered down.
1. Reseat memory or system fan connector.
2. Replace memory or system fan.
516–Processors Do Not Have
the Same Frequency Operating
Range
Installed processors operate at
different frequencies.
Replace a processor so that both operate at the same
frequency.
Table 5-18 POST error messages (continued)
134 Chapter 5 System diagnostics and troubleshooting ENWW
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