Apple imac 20 inch early 2009 User Manual
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 71 2010-11-24 4. Inspect LEFT and RIGHT speaker cones and speaker connection cable for damage. Do speakers have visible damage? Yes Replace damaged speaker. Retest. M09 No Go to step 5. 5. Install known-good speaker into location where distorted sound was heard. Verify that sound quality improves. Yes Speaker bad. Replace speaker and retest. M09 No Suspect speaker amplifier. Replace audio board. M09 Audio: Built-in Speakers...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 72 2010-11-24 2. Launch System Preferences and select Sound/Output options. Set speaker balance 100% to LEFT speaker then play a sound file. Verify that sound is generated by the LEFT speaker and that the sound quality is acceptable. Yes LEFT speaker and amplifier circuitry OK. Go to step 3. No Go to step 6. 3. Set speaker balance 100% to RIGHT speaker then play a sound file. Verify that sound is generated by the RIGHT...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 73 2010-11-24 Camera Issues Unlikely cause: LCD display, power supply, hard drive, optical drive, fans, speakers, microphone Quick Check SymptomsQuick Check Camera Issues • Camera not detected • No green LED for camera • Excessive blooming • Poor white balance • Poor focus • Green image • Image distortion 1. Launch System Profiler and confirm that system’s USB hub and built-in camera are visible. 2. Verify camera lens and...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 74 2010-11-24 FireWire Devices Not Recognized Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check SymptomsQuick Check FireWire Devices Not Recognized • FireWire external drive not recognized • FireWire printer not recognized 1. For external FireWire drives, make sure any external power source is plugged in and operating to isolate a power issue with the device. 2. Test with a known-good...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 75 2010-11-24 4. Is the FireWire device recognized with a known-good FireWire cable on the user’s computer? Yes FireWire cable issue. Issue resolved. No FireWire device may need additional power. Use a powered FireWire hub. If the issue persists, check for any firmware updates for the FireWire device. Go to step 5. 5. Using a powered FireWire hub, and having installed any software or firmware update for the device, is the...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 76 2010-11-24 USB Devices Not Recognized Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check SymptomsQuick Check USB Devices Not Recognized • USB wired keyboard/mouse not recognized • USB external drive not recognized • USB printer not recognized 1. For printers and external USB drives, make sure any external power source is plugged in and operating to isolate a power issue with the device....
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 77 2010-11-24 3. Are known-good mouse and keyboard recognized? Yes Test original mouse and keyboard. Replace if still not recognized. Go to step 5. No External USB ports not functioning. Replace logic board. 4. With no USB devices connected, restart the computer. Did Bluetooth Mouse Setup assistant launch after startup? Yes Bluetooth detected via Internal USB. Go to step 3. No Bluetooth not recognized via internal USB....
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 78 2010-11-24 Wired Keyboard Does Not Function Properly Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check SymptomsQuick Check Wired Keyboard Does Not Function Properly • Some or all keys on the keyboard don’t work • Eject key or Caps Lock key doesn’t seem to work • Some keys don’t work as expected 1. The iMac has 4 USB ports on the rear of the computer. Make sure to try each port to...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 79 2010-11-24 5. With optical media in the drive, hold the Media Eject key. Does the disc eject normally and the eject symbol appear? Yes Media Eject key delay. No repair necessary. No Go to Optical Drive Won’t Accept/Eject Media. 6. Open System Preferences > Universal Access > Keyboard. Is “Slow Keys” enabled? Yes With “Slow Keys” on, you need to press a key for a longer period of time for it to be recognized. No Go to step...
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iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 80 2010-11-24 Keyboard: Specific Keys Do Not Respond Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check SymptomsQuick Check Keyboard: Specific Keys Do Not Respond • One or more keys do not respond when pressed • Key sticks • Keycap missing 1. If wireless keyboard is being used verify that it is properly paired with the system. Jump to Wireless Input Device Doesn’t Pair to resolve pairing...