compaq evo notebook n800c series User Manual
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2–10Maintenance and Service Guide Troubleshooting 2.3 Troubleshooting Flowcharts Ta b l e 2 - 4 Troubleshooting Flowcharts Overview Flowchart Description 2.1 Initial troubleshooting 2.2 No power, part 1 2.3 No power, part 2 2.4 No power, part 3 2.5 No power, part 4 2.6 No video, part 1 2.7 No video, part 2 2.8 Nonfunctioning docking station 2.9 No operating system (OS) loading 2.10 No OS loading from hard drive, part 1 2.11 No OS loading from hard drive, part 2 2.12 No OS loading from hard drive, part 3 2.13 No OS loading from diskette drive 2.14 No OS loading from CD- or DVD-ROM drive 2.15 No audio, part 1 2.16 No audio, part 2 2.17 Nonfunctioning device 2.18 Nonfunctioning keyboard 2.19 Nonfunctioning pointing device 2.20 No network or modem connection 268135-002.book Page 10 Thursday, October 24, 2002 4:10 PM
Troubleshooting Maintenance and Service Guide2–11 Flowchart 2.1—Initial Troubleshooting Connecting to network or modem? Begin troubleshooting. Is there power? Is the OS loading? Is there video? (no boot) Is there sound?Beeps, LEDs, or error messages? Keyboard/ pointing device working?Go to Section 2.17, Nonfunctioning Device. Go to Section 2.2, No Power. Go to Section 2.6, No Video.All drives working? Y Y Y Y YY Y Y N N N N N End N N N Go to Section 2.9, No OS Loading. Go to Section 2.15, No Audio.Go to Section 2.18, Nonfunctioning Keyboard, or Section 2.19, Nonfunctioning Pointing Device. Check LED board, speaker connections. Go to Section 2.20, No Network or Modem. 268135-002.book Page 11 Thursday, October 24, 2002 4:10 PM
2–12Maintenance and Service Guide Troubleshooting Flowchart 2.2—No Power, Part 1 1. Reseat the power cables in the docking station and at the AC outlet. 2. Ensure the AC power source is active. 3. Ensure that the power strip is working. Done Remove from docking station (if applicable). Power up on battery power? Power up on AC power? Power up in docking station? Power up on battery power? Power up in docking station?Done *Reset power. *Reset power.Power up on AC power? NY YN N YN N Y Y YN 1. On some models there is a separate reset button. 2. On some models the computer may be reset using the Suspend switch and either the lid switch or the main power switch. *NOTES:Go to Section 2.4, No Power, Part 3.Go to Section 2.3, No Power, Part 2. Go to Section 2.8, Nonfunctioning Docking Station. No Power (power LED is off). 268135-002.book Page 12 Thursday, October 24, 2002 4:10 PM
Troubleshooting Maintenance and Service Guide2–13 Flowchart 2.3—No Power, Part 2 Continued from Section 2.2, No Power, Part 1. Visually check for debris in battery socket and clean if necessary. Done NY Power on? Check battery by recharging, moving it to another computer, or replacing it. Power on? Done Y Replace power supply (if applicable). N Power on? Done YN Go to Section 2.4, No Power, Part 3. 268135-002.book Page 13 Thursday, October 24, 2002 4:10 PM
2–14Maintenance and Service Guide Troubleshooting Flowchart 2.4—No Power, Part 3 Continued from Section 2.3, No Power, Part 2. Reseat AC adapter in computer and at power source. Internal or external AC adapter? Done Done DoneDone Power on? Power on?Power on? Plug directly into AC outlet. Power LED on? Power outlet active?Try different outlet.Replace external AC adapter. Replace power cord. Y N Y Y Y Y N NN N External Internal Go to Section 2.5, No Power, Part 4. 268135-002.book Page 14 Thursday, October 24, 2002 4:10 PM
Troubleshooting Maintenance and Service Guide2–15 Flowchart 2.5—No Power, Part 4 Y N Continued from Section 2.4, No Power, Part 3. Reseat loose components and boards and replace damaged items. Open computer. Loose or damaged parts? Y Close computer and retest. Power on? Done N Replace the following items (if applicable). Check computer operation after each replacement: 1. Internal DC-DC converter* 2. Internal AC adapter 3. Processor board* 4. System board* *NOTE: Replace these items as a set to prevent shorting out among components. 268135-002.book Page 15 Thursday, October 24, 2002 4:10 PM
2–16Maintenance and Service Guide Troubleshooting Flowchart 2.6—No Video, Part 1 A N Stand-alone or Docking Station? No Video. Replace the following one at a time. Test after each replacement. 1. Cable between notebook and computer display (if applicable) 2. Inverter board (if applicable) 3. Display 4. System board Internal or external display*?Adjust brightness.Video OK? Done Docking Station Internal Stand-alone External Adjust brightness. Video OK? Done Y Press lid switch to ensure operation. Video OK? Done Y N Video OK? DoneDone N Check for bent pins on cable. Tr y another display.Internal and external video OK?Replace system board. YYN N *NOTE: To change from internal to external display, use the hotkey combination. Y Go to Section 2.7, No Video, Part 2. 268135-002.book Page 16 Thursday, October 24, 2002 4:10 PM
Troubleshooting Maintenance and Service Guide2–17 Flowchart 2.7—No Video, Part 2 Y N Continued from Section 2.6, No Video, Part 1. Done Adjust external monitor display.Video OK?Adjust display brightness. Video OK?Video OK? DoneDone Check that notebook is properly seated in docking station, for bent pins on cable, and for monitor connection.Go to “A” in Section 2.6, No Video, Part 1.Check brightness of external monitor. Try another external monitor. Internal and external video OK? Go to Section 2.8, Nonfunctioning Docking Station. YY Y N N N Remove notebook from docking station, if connected. 268135-002.book Page 17 Thursday, October 24, 2002 4:10 PM
2–18Maintenance and Service Guide Troubleshooting Flowchart 2.8—Nonfunctioning Docking Station (if applicable) Y N Reseat power cord in docking station and power outlet. N Replace the following docking station components one at a time. Check computer operation after each replacement. 1. Power supply 2. I/O board 3. Backplane board 4. Switch box 5. Docking motor mechanism Check voltage setting on docking station. Reset monitor cable connector at docking station.Reinstall notebook into docking station. Docking station operating? Docking station operating? Remove notebook, reseat all internal parts, and replace any damaged items in docking station.DoneDone Y Nonfunctioning Docking Station. 268135-002.book Page 18 Thursday, October 24, 2002 4:10 PM
Troubleshooting Maintenance and Service Guide2–19 Flowchart 2.9—No Operating System (OS) Loading No OS loading from hard drive, go to Section 2.10. Reseat power cord in docking station and power outlet. No OS loading from diskette drive, go to Section 2.13. No OS loading from CD- or DVD-ROM drive, go to Section 2.14. No OS loading from network, go to Section 2.20. No OS Loading.* *NOTE: Before beginning troubleshooting, always check cable connections, cable ends, and drives for bent or damaged pins. 268135-002.book Page 19 Thursday, October 24, 2002 4:10 PM