Screen Message Probable Cause Recommended Action
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.
517–Front IEEE 1394 Not
Connected
Front IEEE 1394 port is not connected.
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. Connect IEEE 1394 cable to system board.
2. Replace system board.
518–Detected invalid MAC
address
Workstation has invalid MAC address.
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.
●
Verify correct MAC address. If incorrect, replace
system board.
601–Diskette Controller Error Diskette controller circuitry or diskette
drive circuitry incorrect.
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. Run Computer Setup (F10 Setup).
2. Ensure that cables are connected correctly.
3. Check and replace cables.
4. Clear CMOS by pressing the Clear CMOS button
on the system board.
5. Replace diskette drive.
6. Replace the system board.
605–Diskette Drive Type Error Mismatch in drive type. 1. Check drive cables.
2. Run Computer Setup (F10 Setup).
3. Disconnect any other diskette controller devices
(tape drives).
4. Clear CMOS by pressing the Clear CMOS button
on the system board.
5. Replace diskette drive.
710–NET Watchdog Timer
Expired from Last Boot
System hung during last boot. Press F1 to boot.
912–Computer Cover Has
Been Removed Since Last
System Start Up
System has been opened since last
boot.
No action required.
Table 5-18 POST error messages (continued)
ENWW POST error messages 135
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