Sun Microsystems Ultra 20 M2 Service Manual page 35

Troubleshooting Procedures (Continued)
TABLE 3-1
Problem Possible solution
Newly installed • Make sure that the memory is properly seated on the DIMM
memory is not
detected.
• Move the memory to the other DIMM socket to determine
• Make sure that you are using, 512 MB, 1 GB, or 2GB Unbuffered
• Make sure that the memory is installed in pairs.
System cannot read Check to see that the disk is properly seated. If that does not resolve
the disk the issue, do the following:
information.
1. Turn off the workstation by pressing the Power button.
2. Remove the left side access panel.
3. Check to make sure that the power and data cables are connected
to the backplane of the disk drive and that the pins in the cable and
connector are not bent.
4. Replace the left side access panel.
5. Turn on the workstation.
CD or DVD does not • Move the mouse or press any key on the keyboard. The drive
eject from the media
tray when you press
• Use the utility software installed on your workstation to eject the
the Eject button.
System cannot read Check the following:
CD or DVD
• Are you using the correct type of CD or DVD?
information.
• Do other CDs or DVDs work in this drive?
• Is the CD or DVD properly inserted in the drive?
• Is the CD or DVD clean and unscratched?
• Are the cables connected to the DVD drive?
Keyboard or mouse • Are the keyboard and mouse Type 7? Verify the model on the
does not respond to
actions.
• Verify that the mouse and keyboard cables are connected to the
• Verify that the workstation is powered on and that the front
sockets.
whether the socket is defective.
DDR2 667 SDRAM modules with 3.05 cm max. height.
might be in the low power mode.
CD.
underside of the keyboard.
onboard USB 2.0 connectors on the workstation.
Power LED is illuminated.
Chapter 3 Troubleshooting 3-5