Apple imac 20 inch mid 2009 User Manual
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Display 41 2010-11-24 Pixel Anomalies Unlikely cause: logic board, power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Pixel Anomalies • Dark dot anomalies • Bright dot anomalies • Debris on inside surface of glass panel • Debris on surface of LCD panel 1. Clean outside surface of glass panel using provided cleaning cloth. 2. For information about pixel anomalies, see kBase article: http://support.apple.com/kb/HT1721 Deep Dive Check ResultAction Code 1. Determine if “defects” are dust/ debris on surface of glass panel or LCD. Yes Clean LCD/glass panel. No Go to step 2. 2. Determine if bright pixel defects exceed the acceptable number. See kBase article http://support.apple.com/kb/ HT1721 Yes Replace LCD panel. L08 No LCD panel meets bright pixel defect specifications. Go to step 3. 3. Determine if dark pixel defects exceed the acceptable number. See kBase article http:// support.apple.com/kb/ HT1721 Yes Replace LCD panel L08 No LCD panel meets dark pixel defect specifications. Go to step 3. 4. Determine if the combination of bright/dark pixel defects exceed the acceptable number. See kBase article http://support.apple.com/kb/ HT1721 Yes Replace LCD panel. L08 No Explain to user that LCD panel is operating within specifications for pixel defects. Do not replace LCD panel.
iMac (20-inch, Early/Mid 2009) Symptom Charts — Display 42 2010-11-24 Vertical/Horizontal Lines Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Vertical/Horizontal Lines • Vertical lines • Horizontal lines 1. Boot from install DVD to determine whether potential software issue exists. 2. Verify if issue is visible on an external display. Deep Dive Check ResultAction Code 1. Boot from Install DVD and verify whether issue is still visible. Yes Go to step 2. No Issue likely caused by software or driver issue. Troubleshoot for software issues. Make sure all software updates have been installed. 2. Verify whether issue is visible on an external display attached to the DisplayPort. Yes Issue is NOT caused by internal LCD panel. Go to step 3. No Go to step 5. 3. Remove logic board, inspect connectors for damage or corrosion then reinstall. Verify whether issue still occurs. Yes Replace logic board. Go to step 4. M04 No Issue likely caused by poor connection. Return computer to user. M04 4. Verify whether issue is still present with replacement logic board installed. Yes Return to step 1 and retest. X04 No Issue resolved with replacement logic board. Return computer to user. M04 5. Remove LVDS cable from LCD panel and logic board and carefully verify whether there is damage to the cable or connectors. Yes Replace LVDS cable. No Reinstall LVDS cable. Go to step 6.
iMac (20-inch, Early/Mid 2009) Symptom Charts — Display 43 2010-11-24 6. Verify whether issue is still visible after reinstalling LVDS cable. Yes Replace LCD panel. Go to step 7. No Issue resolved with replacement logic board. Return computer to user. M04 7. Verify whether issue is still present with replacement LCD panel installed. Yes Return to step 1 and retest. No Issue resolved with replacement LCD panel. Return computer to user. L04
iMac (20-inch, Early/Mid 2009) Symptom Charts — Display 44 2010-11-24 Non-Uniform Brightness Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Non-Uniform Brightness • Brightness not uniform • Color not-uniform 1. Verify System Preferences > Displays > Brightness level control is set above minimum. 2. Allow 15 minutes for backlight bulbs to reach normal operating temperature and output before evaluating display. 3. Visually inspect glass panel for presence of dust, cigarette smoke, or other contaminants. Clean glass panel if needed. Deep Dive Check ResultAction Code 1. Determine if brightness uniformity issue is visible after display has warmed up for ~15 minutes. Yes Go to step 2. No Display backlight can take several minutes to stabilize. Retest. If issue still not visible return computer to user. 2. Use user provided examples showing brightness uniformity issue. Determine if variation in uniformity appears excessive when compared to another similar unit. Yes Go to step 3. No Demonstrate to user that LCD performs similarly to another unit of the same make and model. 3. Remove front bezel and loosen screws securing LCD. Determine if brightness uniformity improves. Yes Inspect for mechanical interference with screws, chassis, wires making contact with back of LCD. Reseat components & cables; retest. No Go to step 4. 4. With LCD panel screws removed inspect and then reconnect the backlight cables. Determine if brightness uniformity improves. Yes One or more backlight connections were loose. Return computer to user. L14 No Replace LCD panel. L07
iMac (20-inch, Early/Mid 2009) Symptom Charts — Display 45 2010-11-24 Cosmetic Defects Quick Check SymptomsQuick Check Cosmetic Defects to LCD • Cracked LCD • Scratched LCD polarizer • Scorched or melted LCD • LCD impact damage • Foreign material on LCD or back side of glass panel. 1. Determine whether damage was caused by user environment, accidental damage, or abuse. If applicable, inform the user that Apple does not warrant damage caused by accident, abuse, misuse, flood, fire, earthquake, or other external causes. For more information refer to: http://www.apple.com/legal/warranty 2. For dark and bright pixel anomalies, go to Pixel Anomalies. Uncategorized Symptoms Quick Check Symptoms Quick Check Uncategorized Symptoms • Unable to locate appropriate symptom code. 1. Make sure brightness level is set above minimum. 2. Clean glass panel using provided cleaning cloth to make sure that external contaminants are removed prior to evaluating display performance. 3. Allow the iMac display to warm up approximately 15 minutes before evaluating display color and brightness uniformity performance. Deep Dive Check ResultAction Code 1. Verify whether existing symptom code applies to the issue reported by the user. Yes Jump to appropriate symptom code flow. No Document reported failure and send feedback to [email protected] stating that a suitable symptom code wasn’t found. Provide as much detail as possible. N99
iMac (20-inch, Early/Mid 2009) Symptom Charts — Mass Storage 46 2010-11-24 Mass Storage Hard Drive Not Recognized Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Drive Not Recognized (H01) Drive No Boot (H02) • Flashing Question Mark • Boots to Grey Screen • Boots to Blue Screen 1. Use a known-good mouse. A stuck mouse button will not allow boot. 2. Boot from Install DVD. Verify S.M.A.R.T. status of drive using Disk Utility. 3. Repair disk using Disk Utility. 4. Erase disk and reinstall Mac OS using Install DVD. 5. Use Target Disk Mode to attempt to mount user’s hard drive on a known-good computer. If mounted, use Disk Utility on host computer for Quick Checks 2, 3 and 4. Deep Dive Check ResultAction Code 1. Boot from Install DVD and run Disk Utility. Verify that user hard drive is available for Disk Utility to repair. Yes Go to step 2. No Go to step 5. 2. Run Disk Utility ‘Repair Disk’ function and verify that it completes successfully. Yes Go to step 3. No Go to step 4. 3. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Data error Issue resolved. Return computer to user. H07 No Go to step 4. 4. Erase disk and reinstall Mac OS using Install DVD. Verify that installation process completes. Yes Go to step 8. No Go to step 5. 5. Inspect hard drive SATA and power cables and connectors for bent pins, or other damage to the cable. Yes Replace damaged cable. Go to step 8. H04 No Go to step 6.
iMac (20-inch, Early/Mid 2009) Symptom Charts — Mass Storage 47 2010-11-24 6. Reseat SATA and logic board hard drive connections and verify whether computer starts up. Yes Go to step 8. No Replace SATA cable. Go to step 8. H04 7. Test with known-good hard drive. Verify that system boots successfully and that Disk utility ‘Verify’ function reports no errors. Yes Install user drive. Go to step 9. No SATA cable verified or replaced and known-good hard drive installed. Suspect possible SATA controller issues. Replace logic board. Go to step 1. 8. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Issue resolved. Return system to user. No Go to step 7. 9. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Issue resolved. No Hard drive appears to be defective. Go to step 10. 10. Replace hard drive. Does drive format correctly with a GUID partition map and install Mac OS X without errors? Yes Issue resolved by replacing hard drive. H05 No SATA cable verified or replaced and new hard drive installed. Replace logic board. M19
iMac (20-inch, Early/Mid 2009) Symptom Charts — Mass Storage 48 2010-11-24 Hard Drive Read/Write Error Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Drive Read/Write Error (H03) Drive Bad Sector/Defective (H05) Drive Formatting Issues (H07) • Cannot save documents • Read/write error message • Hang when accessing or saving data 1. Boot from Install DVD. Verify S.M.A.R.T. status of drive using Disk Utility. 2. Repair disk using Disk Utility. 3. Erase disk and reinstall Mac OS using Install DVD. 4. Use Target Disk Mode to mount user’s hard drive on a known-good computer. Use Disk Utility on host computer for Quick Checks 1 through 4. Deep Dive Check ResultAction Code 1. Run Disk Utility ‘Repair Disk’ function and verify that it completes successfully. Yes Go to step 2. No Go to step 3. 2. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Data error. Issue resolved. Return computer to user. H07 No Go to step 3. 3. Erase disk and reinstall Mac OS using Install DVD. Verify that installation process completes. Yes Go to step 7. No Go to step 4. 4. Inspect hard drive SATA and power cables and connectors for bent pins, or other damage to the cable. Yes Replace damaged cable. Go to step 7. H04 No Go to step 5. 5. Reseat SATA and logic board hard drive connections and verify whether computer starts up. Yes Go to step 7. No Replace SATA cable. Go to step 7. H04 6. Test with known-good hard drive. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Install user drive. Go to step 8. No SATA cable verified or replaced and known-good hard drive installed, Replace logic board.
iMac (20-inch, Early/Mid 2009) Symptom Charts — Mass Storage 49 2010-11-24 7. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Issue resolved. Return system to user. No Go to step 6. 8. Reboot computer. Verify that system boots successfully and that Disk Utility ‘Verify’ function reports no errors. Yes Issue resolved. No Hard drive appears to be defective Go to step 9. 9. Replace user hard drive. Does drive format correctly with a GUID partition map and install Mac OS X without errors? Yes Issue resolved by replacing hard drive. No SATA cable verified or replaced and new hard drive installed. Replace logic board. Hard Drive Noisy Unlikely cause: LCD panel, logic board, power supply, speakers, camera, microphone Quick Check Symptoms Quick Check Hard Drive Noisy (H06) • Noise during start up • Noise during operation • Noise when drive is copying or saving data 1. Start up from Install DVD. Verify S.M.A.R.T. status of drive using Disk Utility. 2. Repair disk using Disk Utility. 3. Determine if noise is comparable to another machine of the same model. Deep Dive Check ResultAction Code 1. Boot from the Install DVD and run Disk Utility. Verify that user hard drive is available for Disk Utility to repair. Yes Go to step 2. No Go to Hard Drive Not Recognized. 2. Run Disk Utility ‘Repair Disk’ function and verify that it completes successfully. Yes Go to step 3. No Go to step 4.
iMac (20-inch, Early/Mid 2009) Symptom Charts — Mass Storage 50 2010-11-24 3. Restart the computer. Verify whether the noise is still present. Yes Go to step 6. No Data error issue resolved by Disk Utility. Return system to user. H06 4. Erase disk and reinstall Mac OS using Install DVD. Verify that installation process completes. Note: Make sure data has been backed up before erasing hard drive. Yes Go to step 3. No Replace hard drive. Go to step 5. H06 5. With replacement hard drive installed reboot computer. Verify whether noise is still present. Yes Go to step 6. No Issue resolved by replacing hard drive. 6. With hard drive removed verify that rubber vibration isolation grommets are properly installed in hard drive mounting bracket. Yes Go to step 8. No Replace hard drive mounting bracket. Go to step 7. H06 7. Reboot computer. Verify whether noise is still present. Yes Replace hard drive. Go to step 6. No Noise caused by chassis/ hard drive bracket. Return system to user. 8. Disconnect hard drive SATA and power connections then boot from the Install DVD. Determine if noise is caused by the fans in the computer. Yes Go to Fan Failures/Thermal Issues. No Go to step 9 9. Disconnect the hard dive SATA and optical drive then boot from an external volume. Determine if the noise disappears when the optical drive has been disconnected. Yes Posible optical drive or media issue. Go to Optical Drive Noisy. No Noise issue still present, but does not appear to be caused by hard drive. Go to Noise/ Hum/Vibration.