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Chapter 7: Troubleshooting
Monitor
Your server has no video and the LED on the control panel indicates that the system is
in reset mode
■ Make sure that all the cables, processors, and VRMs are fully seated.
■ Possibly a faulty VRM. Replace the VRM(s).
Your server is running but there is no picture
■ Adjust the brightness and contrast controls to the center position.
■ Make sure that the monitor is plugged in and turned on. If the monitor is turned on,
the power LED should be lit.
■ Check the port and cable for bent or damaged pins.
■ Check the memory boards for fault LEDs. Replace faulty DIMMs.
■ Connect your monitor to another computer, or connect a monitor that you know
works to your server.
The color is not uniform
Make sure that the monitor warms up for at least 30 minutes before making a final
judgment about color uniformity.
Make sure that:
■ The monitor is not positioned too close to another monitor, electric fan, or fluorescent
light.
■ You demagnetize the screen using the monitor’s degauss feature. For more information
on degauss, see the monitor’s documentation.
A horizontal line or wire is visible across the monitor screen
The monitor may use thin damper wires, located approximately 1/3 of the way from the
upper and lower screen edges, to stabilize the internal aperture grille. These wires are most
obvious when the monitor displays a white background. The aperture grille allows more
light to pass through the screen for brighter colors and greater luminescence. The damper
wire is a critical part of the overall monitor design and does not negatively affect the
monitor’s function.
Power
You press the power button, but the server does not turn on
■ If the power button LED is green, the server is turned on, but you may not be seeing
an image on the monitor. For monitor troubleshooting, see “Monitor” on page 220.
8510702.book Page 220 Thursday, July 7, 2005 11:21 AM