Apple imac 20 inch mid 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 Have No Audio Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check Audio: Built-in Speakers Have No Audio • No audio from one or both speakers • Audio from speakers distorted 1. Launch System Preferences and select Sound/ Output options. Verify that the sound output option is set to system’s internal speakers. 2. Launch System Preferences and select Sound/ Output options. Verify that the ‘Output Volume’ setting is set above the minimum level and that the ‘mute’ option is not selected. 3. Launch System Preferences and select Sound/ Output options. Verify that ‘Balance’ is set to middle position so that the left and right speakers are utilized. Deep Dive Check ResultAction Code 1. Verify whether boot chime is present when system is powered on. Note: make sure audio output preferences are not set to mute and volume is set to mid-range. Yes Go to step 2. No Audio board not detected by system. Reseat audio board, then retest. Replace audio board if problem persists. M09
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 speaker and that the sound quality is acceptable. Yes RIGHT speaker and amplifier circuitry OK. Set ‘Balance’ slider to the middle position. Go to step 4. No Go to step 6. 4. Verify whether user-reported audio issue has been resolved. Yes Issue no longer present. Return system to user. No Go to step 5. 5. Boot system from Install DVD or another known-good bootable volume. Verify whether issue still occurs. Yes Go to step 6. No Known-good boot volume works OK. Troubleshoot for software issue. Isolate whether issue is application specific or whether possible operating system conflict. Make sure user data backed up before removing or reinstalling software. 6. Connect external speakers to Headphone Out port and set System Preferences Sound/Output to external speakers, then play a sound file. Verify that sound quality is acceptable. Yes Audio board, internal speakers, and external headphone port functioning correctly. Return system to user. No Go to step 7. 7. Disconnect and carefully inspect flexible cable and connectors connecting audio board to MLB for damage such as bent pins or pinched/cut wires. Yes Replace damaged part(s) then retest. Return to step 1 if problem continues to verify whether symptom has changed. M09 No Replace audio board then retest. M09
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 glass panel are clean and free of contaminants. Use cleaning cloth to clean glass panel if needed. 3. Launch PhotoBooth to verify that the green indicator LED near the camera lens turns on and that the image quality is acceptable. Deep Dive Check ResultAction Code 1. Launch System Profiler and confirm that the display’s USB hub is visible in the USB tree. Yes USB hub recognized. Go to step 2. No USB hub not recognized. Go to USB Devices Not Recognized. 2. Verify that camera is visible in display’s USB tree. Yes Camera recognized. Go to step 3. No Inspect and reseat camera cable and connectors at the camera and the logic board. Retest. Replace camera cable if problem persists. L14 3. Launch PhotoBooth. Verify that green LED near camera lens turns ON and image appears normal. Yes Camera functioning. Obtain additional information from user. Return system to user. No Replace camera. Retest. M13
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 FireWire device to isolate a failed peripheral issue. 3. Test with a known-good FireWire cable to isolate a FireWire cable issue. 4. Ensure that all available Software Updates have been applied to the computer. Deep Dive Check ResultAction Code 1. Unplug all FireWire devices from the computer. Start the computer and reset PRAM. Reconnect the FireWire device in question. Is the FireWire device recognized? Yes Issue resolved. No Possible logic board failure. Go to step 2 2. Use a known-good FireWire cable with a known-good FireWire device (another Mac in FireWire Target Disk mode is good). Is this device recognized? Yes Try the FireWire device in question with a known-good computer of the same model. Go to step 3 No FireWire not recognized. Replace logic board. M12 3. Is the FireWire device recognized on a known-good computer of the same model? Yes Test the FireWire device with a known-good cable on user’s computer. Go to step 4 No FireWire device may need additional power. Use a powered FireWire hub. Go to step 5.
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 FireWire device recognized now? Yes Device recognized. Required additional power from hub or update. Issue resolved. No Device may require additional software, or there may be a conflict in the Mac OS. Test in New User. Go to step 5 6. Is the FireWire device recognized with a New User? Yes Software Issue. Troubleshoot software on User account. Issue resolved. No Apply all Mac OS updates. If the issue persists, replace the FireWire device.
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. 2. The iMac has 4 USB ports on the rear of the computer. Make sure to try each port to isolate a particular port malfunction. 3. Test with a known-good wired keyboard or mouse to isolate a failed peripheral issue. 4. Test with a known-good USB cable when dealing with a printer or external USB drive, to isolate a USB cable issue. 5. Ensure that all available Software Updates have been applied to the computer. Deep Dive Check ResultAction Code 1. Unplug all USB devices from the computer except for the keyboard and mouse. Start the computer and reset PRAM. Are the keyboard and mouse recognized? Yes Test in all USB ports to ensure all USB ports working as expected. Replace logic board for any port failures. No Possible logic board failure. Go to step 2. 2. Did Bluetooth Mouse Setup assistant launch after startup? Yes Bluetooth detected via Internal USB, but external USB devices not recognized. Go to step 3 No Bluetooth not recognized via internal USB. Disconnect mouse and keyboard. Go to step 4
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. Internal and external USB not functioning. Replace logic board. M15 5. With known-good mouse and keyboard working, test other USB peripheral in question (USB external drive or printer, etc.). Is the device recognized via Apple System Profiler under USB? Yes Device recognized. Test in all USB ports to ensure all USB ports working as expected. Replace logic board for any port failures. No Device may require more power than supplied by USB ports. Try powered USB hub. Go to step 6. 6. Does powered USB hub resolve issue? Yes Test device on another computer of the model. If another computer does not require a powered USB hub to allow functionality, replace the logic board No Test device on another computer of the same model. If another computer does not recognize the device, replace the device.
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 isolate a particular port malfunction. 2. Test with a known-good wired keyboard to isolate a failed peripheral issue. 3. Test the keyboard on another Mac. If it works here, you may have bad USB port if the keyboard doesn’t work at all, or a software issue if the keyboard is working but not as expected. 4. Ensure that all available Software Updates have been applied to the computer. Deep Dive Check ResultAction Code 1. Do any of the keys on the keyboard work? Yes Go to step 2. No Go to USB Devices Not Recognized. 2. Is Caps Lock working as expected? Yes Go to step 3. No Go to Keyboard: Specific Keys Do Not Respond. 3. Is the Media Eject key working as expected? Yes Go to step 4. No To prevent accidentally ejecting media, Mac OS X adds a slight delay to the Media Eject key before it takes effect. Go to step 5. 4. Open System Preferences > Speech. Is “Speak selected text when the key is pressed” enabled? Yes The key combination to speak text cannot be used for any other purpose. Either disable or change to a more rare key combination (including Shift, Command, Option and Control). No Go to step 6. M15
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 7. 7. Open System Preferences > Universal Access > Keyboard. Is “Mouse Keys” enabled? Yes With “Mouse Keys” on, you cannot use the Numeric Keypad to enter numbers. It will move the mouse pointer instead. No Go to step 8. 8. Open System Preferences > International > Input Menu. Check “Keyboard Viewer”. Then, from the Input Menu in the Menu Bar (flag), choose “Show Keyboard Viewer”. When typing on the keys that are not responding, do they show in the Keyboard Viewer? Yes The keys are being recognized. Go to step 9 No The keys are not being recognized. Replace keyboard. K01 9. Open TextEdit or another text application and try typing something using the non- responding keys. Do they type in another application? Yes Application-specific issue. Troubleshoot the application. No Test another User to isolate a User account issue. If the issue persists in multiple User accounts, reinstall Mac OS X from the Install DVD.
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 issues. 2. The caps lock key has a built-in delay to reduce accidental activation and must be held for approximately ½ second for it to be activated. Refer to http://support.apple.com/kb/TS1578 for additional information. 3. Inspect the keyboard for signs of liquid spills or other contamination. Apple’s warranty does not cover accidental damage. 4. If the keycap is loose attempt to reattach it. 5. For other keyboard issues jump to the appropriate symptom flow. Wired Keyboard/Mouse Not Recognized Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check Wired Keyboard/Mouse Not Recognized • USB wired keyboard/mouse not recognized when plugged in. • Mighty Mouse scroll ball not working or not working as expected. • Mighty Mouse buttons not working or not working as expected. 1. The iMac has 4 USB ports on the rear of the computer. Make sure to try each port to isolate a particular port malfunction. 2. Test with a known-good wired keyboard or mouse to isolate a failed peripheral issue. 3. Test a mouse when connected directly to ports on the back of the iMac to isolate a keyboard USB port issue. 4. Ensure that all available Software Updates have been applied to the computer.