Apple imac 21 5 inch late 2009 User Manual
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iMac (21.5-inch, Late 2009) Symptom Charts — Display 51 2010-11-18 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. 2. See kBase #HT1721: About LCD display pixel anomalies. Deep Dive Check ResultAction Code 1. Determine if “defects” are dust/ debris on surface of glass panel or LCD. Yes Clean glass and/or LCD using procedures in Glass Panel take-apart chapter. No Go to step 2. 2. Determine if bright pixel defects exceed acceptable number. See kBase #HT1721: About LCD display pixel anomalies. Yes Replace LCD panel. L08 No LCD panel meets bright pixel defect specifications. Go to step 3. 3. Determine if dark pixel defects exceed acceptable number. See kBase #HT1721: About LCD display pixel anomalies. Yes Replace LCD panel. L08 No LCD panel meets dark pixel defect specifications. Go to step 4. 4. Determine if combination of bright/dark pixel defects exceed acceptable number. See kBase #HT1721: About LCD display pixel anomalies. 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 (21.5-inch, Late 2009) Symptom Charts — Display 52 2010-11-18 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 if 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 if 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 if issue is visible on an external display attached to mini DisplayPort. Yes Issue NOT caused by internal LCD. For systems with a video card, go to step 3. For systems without a video card, go to step 4. No Go to step 6. 3. If a video card is present, remove video card and inspect connector for damage or corrosion then reinstall. Verify if issue still occurs. Yes Replace video card. Go to step 8. M24 No Issue likely caused by poor video card connection. 4. For systems without video card, horizontal lines may be related to a failing RAM module. Verify if video issue only happens AFTER Apple logo and spinning wheel appear. Yes Issue only happens AFTER Apple logo and spinning wheel appear. Go to step 5. No Issue present before Apple logo and spinning wheel appear. Go to step 8. 5. Start with shift key down (safe mode) to disable system extensions. Verify if issue still happens when booting in safe mode. Yes Go to step 8. No No video issue when booting in safe mode. Go to step 6.
iMac (21.5-inch, Late 2009) Symptom Charts — Display 53 2010-11-18 6. Isolate with only one memory module installed, then with the other one. Test with known- good memory. Verify if issue only happens with specific RAM module(s). Yes Replace affected RAM module. X02 No Go to step 7. 7. Isolate with one known-good memory module installed in one memory slot. Repeat by testing in other memory slots Verify if issue only happens with specific memory slot of logic board. Yes Replace logic board and retest. M07 No Go to step 8. 8. Remove LVDS cable between LCD panel and logic board and verify if there is damage to cable or connectors. Yes Replace LVDS cable. Go to step 9. X04 No Reinstall LVDS cable . Go to step 9. 9. Verify if issue is still present after reinstalling LVDS cable. Yes Replace logic board. If video card was present, reinstall original video card. Go to step 10. M04 No Issue resolved. 10. Verify if issue is still present with replacement logic board installed. Yes Go to step 11. No Issue resolved. 11. Reinstall original logic board and verify if issue is still present with original logic board reinstalled. Yes Replace LCD panel. L04 No Issue resolved . If a video card was present, reinstall original video card.
iMac (21.5-inch, Late 2009) Symptom Charts — Display 54 2010-11-18 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 slider is set above minimum. 2. Allow 15 minutes for backlight 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 about 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. Look at user-provided examples showing brightness uniformity issue. Determine if variation in uniformity appears excessive when compared to another same-model computer. Yes Go to step 3. No Demonstrate to user that LCD performs similarly to another computer of the same model. 3. Remove glass panel and loosen screws securing LCD panel. Determine if brightness uniformity improves. Yes Inspect for mechanical interference with screws or cables making contact with back of LCD. Reseat components & cables, retest. No Go to step 4. 4. Remove LCD panel, then inspect and reseat backlight cables. Determine if brightness uniformity improves. Yes One or more backlight cables were loose. No Replace LCD panel. L07
iMac (21.5-inch, Late 2009) Symptom Charts — Display 55 2010-11-18 Cosmetic Defects 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 if damage was caused by user environment, accidental damage, or abuse. If applicable, inform 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 see Pixel Anomalies symptom flow. 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 to make sure external contaminants are removed prior to evaluating display performance. 3. Allow LCD display to warm up approximately 15 minutes before evaluating display color and brightness uniformity performance. Deep Dive Check ResultAction Code 1. Verify if existing symptom code applies to issue reported by 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 (21.5-inch, Late 2009) Symptom Charts — Mass Storage 56 2010-11-18 Mass Storage Hard Drive Not Recognized Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Drive Not Recognized Drive No Boot • Flashing Question Mark • Boots to Grey Screen • Boots to Blue Screen • Boots to Prohibitory Symbol (Review kBase #HT2674: Intel- based Mac: Startup sequence and error codes, symbols) 1. Use a known-good mouse. A stuck mouse button will not allow boot. 2. Boot from Install DVD. Use Disk Utility to verify S.M.A.R.T. status of hard drive. 3. Use Disk Utility to repair disk. 4. Verify that user’s data is backed up and that user authorizes erasing disk and reinstalling software. 5. Use Target Disk Mode to mount user’s hard drive on a known-good computer. Use Disk Utility on host computer for Quick Checks 2 through 4. Deep Dive Check ResultAction Code 1. Boot from Install DVD and run Disk Utility. Verify if user’s hard drive is available for Disk Utility to repair. Yes Go to step 2. No Go to step 5. 2. Run Disk Utility’s “Repair Disk” function and verify if it completes successfully. Yes Go to step 3. No Go to step 4. 3. Reboot computer. Verify if system boots successfully and that Disk Utility “Verify” function reports no errors. Yes Data error. Issue resolved. H07 No Go to step 4. 4. With user’s permission, erase hard drive and reinstall Mac OS. Verify if 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 SATA cable or DC power cable. Go to step 8. X03 No Go to step 6.
iMac (21.5-inch, Late 2009) Symptom Charts — Mass Storage 57 2010-11-18 6. Reseat hard drive SATA cable at logic board and hard drive connections, and verify if computer starts up. Yes Go to step 8. No Replace SATA cable. Go to step 8. X03 7. Test with known-good bootable hard drive. Verify if system boots successfully and that Disk Utility “Verify” function reports no errors. Yes Install user’s hard drive. Go to step 9. No SATA cable verified or replaced and known-good hard drive installed. Replace logic board. Go to step 1. 8. Reboot computer. Verify if 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 if system boots successfully and that Disk Utility “Verify” function reports no errors. Yes Issue resolved. No User’s hard drive appears to be defective. Go to step 10. 10. Replace hard drive. Boot from system-specific Install DVD and reinstall Mac OS X with drive format option. Verify if drive is formatted correctly (GUID partition table) and that software restore was successful. Yes Issue resolved by replacing hard drive. H01 No SATA cable verified/replaced and new hard drive installed, Check with known-good restore DVD. If restore failure still happens, go to step 11. 11. If restore is unsuccessful, startup a known-good system in Target Disk Mode and connect it to the user’s system with a FireWire cable. Once set up, insert the iMac Install Disc in its optical drive. Startup user’s system while holding Option key, select and boot from the Install Disc DVD and restore system software. Verify if software restore was successful. Yes Restore failure seems to be due to internal optical drive or media issue. Go to Optical Drive Read/Write Error symptom flow. No Restore failure seems to be due to internal SATA bus issue. Replace logic board. M19
iMac (21.5-inch, Late 2009) Symptom Charts — Mass Storage 58 2010-11-18 Hard Drive Read/Write Errors Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check SymptomsQuick Check Drive Read/Write Error Drive Bad Sector/Defective Drive Formatting Issues • Cannot save documents • Read/write error message • Hang when accessing or saving data 1. Boot from Install DVD. Use Disk Utility to verify S.M.A.R.T. status of hard drive. 2. Use Disk Utility to repair disk. 3. Verify that user’s data is backed up and that user authorizes erasing disk and reinstalling software. 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 2 through 3. Deep Dive Check ResultAction Code 1. Run Disk Utility ‘Repair Disk’ function and verify if it completes successfully. Yes Go to step 2. No Go to step 3. 2. Reboot computer. Verify if system boots successfully and that Disk Utility “Verify” function reports no errors. Yes Data error. Issue resolved. H07 No Go to step 3. 3. With user’s permission, erase hard drive and reinstall Mac OS. Verify if installation process completes. Yes Go to step 6. No Go to step 4. 4. Inspect hard drive SATA, power cables and connectors for bent pins, or other damage to the cable. Yes Replace damaged cable. Go to step 6. H04 No Go to step 5. 5. Reseat SATA cable on hard drive and logic board. Verify if computer starts up. Yes Go to step 6. No Replace hard drive data cable. Go to step 6. H04 6. Reboot computer. Verify if system boots successfully and Disk Utility “Verify” function reports no errors. Yes Issue resolved. No Go to step 7.
iMac (21.5-inch, Late 2009) Symptom Charts — Mass Storage 59 2010-11-18 7. Test with known-good hard drive. Verify if system boots successfully and Disk Utility “Verify” function reports no errors. Yes Reinstall user’s hard drive, go to step 8. No SATA cable verified or replaced and known-good hard drive installed. Replace logic board. 8. Reboot computer. Verify if system boots successfully and that Disk Utility “Verify” function reports no errors. Yes Issue resolved. No User’s hard drive appears to be defective. Go to step 9. 9. Replace user’s hard drive. Verify if drive formats correctly with a GUID partition map and installs Mac OS without errors. Yes Issue resolved by replacing user’s hard drive. H03 No SATA cable verified or replaced and new hard drive did not resolve issue. Replace logic board. M19 Hard Drive Noisy Unlikely cause: LCD panel, logic board, power supply, speakers, camera, microphone Quick Check Symptoms Quick Check Hard Drive Noisy • Noise during start up • Noise during operation • Noise when drive is copying or saving data 1. Boot from Install DVD. Use Disk Utility to verify S.M.A.R.T. status of hard drive. 2. Use Disk Utility to repair disk. 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 if user hard drive is available for Disk Utility to repair. Yes Go to step 2. No Go to Hard Drive Not Recognized symptom flow. 2. Run Disk Utility ‘Repair Disk’ function and verify if it completes successfully. Yes Go to step 3. No Go to step 4.
iMac (21.5-inch, Late 2009) Symptom Charts — Mass Storage 60 2010-11-18 3. Restart the computer. Verify if the noise is still present. Yes Go to step 4. No Issue resolved. Return system to user. H06 4. With user’s permission, erase hard drive and reinstall Mac OS. Verify if installation process completes. Yes Go to step 3. No Replace hard drive. Go to step 5. 5. With replacement hard drive installed, reboot computer. Verify if noise is still present. Yes Replacement hard drive did not resolve issue. Go to step 6. No Issue resolved by replacing hard drive. H06 6. With hard drive removed verify if rubber vibration isolation grommets are properly installed in hard drive bracket (attached to hard drive) and to mechanism in rear housing (where hard drive pins insert). Yes Go to step 8. No If grommets are missing or damaged, replace hard drive bracket or mechanism as appropriate. Go to step 7. 7. Reboot computer. Verify if noise is still present. Yes Go to step 8. No Issue resolved. Return computer to user. H06 8. Disconnect hard drive SATA and power connections then boot from the Install DVD. Verify if noise is caused by fans. Yes Go to Fan Failures/Thermal Issues symptom flow. No Go to step 9. 9. Disconnect hard drive and optical drive then boot from an external volume. Verify if noise disappears when optical drive has been disconnected. Yes Possible optical drive or media issue. Go to Optical Drive Noisy symptom flow. No Noise issue still present, but does not appear to be caused by hard drive. Go to Noise/ Hum/Vibration symptom flow.