Screen Message Probable Cause Recommended Action
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.
514–VRD fan not
detected
VRD fan on liquid cooling unit
not functioning.
Verify VRD fan operation; replace if
necessary.
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.
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 6-18 POST error messages (continued)
ENWW POST error messages 163
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