Apple Xserve G5 - Manual (Page 86)

12 - Xserve G5 Troubleshooting Video Symptom Charts
Video
Screen is black, but activity lights flash at startup, drive operates, blowers are
running, and power LED is lit
1. Verify that the system ID button on the back of the logic board aligns with the
opening in the chassis back panel. If it does not, realign the logic board.
2. Check video card connections and connector pins.
3. Test with a known-good monitor. Replace the monitor, if necessary.
4. Remove all third-party devices.
5. Reseat the video card.
6. Clear parameter RAM. Hold down Command-Option-P-R during startup.
7. Reset the logic board. Refer to “Resetting the PMU on the Logic Board” in this
chapter.
8. Replace the video card.
9. Replace the logic board. Note: When installing the new logic board, make sure the
ports and ID button on the back of the board align with the openings in the chassis.
Screen is black, power LED is lit, blowers spin, activity lights do not flash, and
drives do not operate
1. Verify that the system ID button on the back of the logic board aligns with the
opening in the chassis back panel. If it does not, realign the logic board.
2. Reset the logic board. Refer to “Resetting the PMU on the Logic Board” in this
chapter.
3. Reseat the processor module.
4. Replace the processor module.
5. Replace the logic board. Note: When installing the new logic board, make sure the
ports and ID button on the back of the board align with the openings in the chassis.
Video is distorted
1. Make sure that the video card driver and firmware are updated to the most recent
versions.
2. Refer to the adjustments section of the service manual or owner’s manual for the
monitor. Adjust monitor as necessary.
3. Third-party monitors: Try a known-good monitor.
4. Reseat the video card.
5. Replace the video card.