Service manual

Chapter 5 Troubleshooting

PCI board fails intermittently

• Verify the PCI card is properly seated. Clean the card-edge contacts.

• Check for adequate air circulation in the system board area (no over-temp problems).

• Verify you have the most up-to-date driver for the NOS in use. Check the part number and

revision level of the board and check with its manufacturer for the latest driver for your NOS.

PCI firmware is not loaded

• Use diagnostics to check integrity of system memory.

• Check board part/revision number and check with manufacturer to see if it is appropriate for the

NetServer and the NOS in use.

Video/Monitor Problems

Use this topic to help solve Video/Monitor problems.

l Nothing is displayed on the monitor

l The monitor is blank and the computer beeps

l The wrong size characters appear on the monitor

l Colors are wrong or there are no colors on the monitor

NOTE If you disconnect the monitor from the video connector, ensure you reconnect the

monitor before you turn on the NetServer again.

1. Review the Troubleshooting Checklist before you continue.

2. Check the contrast and brightness controls to ensure each one is adjusted.

3. Verify the video and power cables are connected.

4. Ensure there is adequate power:

A. Verify the display is turned on.

B. Verify the display power cable is connected to an AC power outlet and the video cable

connected to the NetServer's video connector.

C. Plug in a known working device to ensure there is power to the outlet or use the proper

testing device to check the power outlet.

D. Turn the monitor off and on, and if the monitor has an on-off LED, see if it lights.

5. If the problem persists, and if the power cable is detachable, try a known good power cable.

6. Check the monitor display to see if the system memory count takes place correctly:

A. Turn the NetServer off and then on again. Verify the memory is counted during the

NetServer boot. If no count occurs, go to Step 8.

B. Verify the count occurs in the correct color for the monitor.

C. If the count occurs in the wrong color, the problem may be with the video subsystem, the

monitor, or the monitor cable. (Continue with the troubleshooting steps.)

7. If you are using a video screen saver utility, verify the following items.

A. If the screen goes blank while using the keyboard, you may be using an application that

turns off the screen even when you are using the keyboard.