Apple imac 20 inch mid 2009 User Manual

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 61 2010-11-24
Ethernet Port/Device Issue
Unlikely cause:  LCD display, power supply, hard drive, optical drive, fans
Quick Check
SymptomsQuick Check
Ethernet Port/Device Issue
•  No ethernet device present
•  Unable to access network 
resources
•  Ethernet device shows no 
connection
•  Ethernet device unable to an IP 
address
•  Slow network performance 1.
  Check the ethernet cable for damage, try a 
known-good ethernet cable – CAT5 or...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 62 2010-11-24
4. Check for speed and duplex 
issues on the network. Open 
System Preference > Network; 
click the Advanced button, 
then the Ethernet tab. Is the 
speed and duplex reported 
what is expected? Yes
Go to step 5.
No
Change the speed and duplex 
settings. See kBase article 
http://docs.info.apple.com/
article.html?path=Mac/10.5/
en/8711.html. Go to step 6.
5.   Check for MTU (Maximum 
Transmission Unit) issues. 
See article...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 63 2010-11-24
Deep Dive
CheckResultAction Code
1.   Without any wired input 
devices connected, start the 
computer. Does the computer 
show the Bluetooth Mouse 
Setup assistant? Yes
Bluetooth hardware is active. 
Go to step 4.
No Inspect and reseat Bluetooth 
cable to Bluetooth card. 
Replace a damaged cable.  
Go to step 2.
2.  Restart the machine without 
any wired input devices 
attached. Does the computer 
show the Bluetooth Mouse 
Setup...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 64 2010-11-24
Wireless Input Device Loses Connection
Quick Check
SymptomsQuick Check
Wireless Input Device Loses 
Connection
•  Wireless keyboard, mouse, or 
other wireless input device 
loses connection.
1.  Remove and reinstall the batteries for the device.
2.  Check that device is powering on.
3.   Use known-good batteries with the device.
4.  Ensure other devices pair and keep connection 
without issue. If not, go to AirPort/Bluetooth...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 65 2010-11-24
5.  Log into new Admin User 
account. With the device 
on, run the Bluetooth Setup 
Assistant. Can you successfully 
pair the device with the New 
User? Yes
User-based issue. 
Troubleshoot software on 
User account. No repair 
needed.
No Remove the following file: /
Library/Preferences/com.
apple.Bluetooth.plist   
Go to step 6.
6.  Restart the computer. With the 
device on, run the Bluetooth 
Setup Assistant. Can you...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Communications 66 2010-11-24
Uncategorized Symptoms
Quick Check
SymptomsQuick Check
Uncategorized Symptoms
•  Unable to locate appropriate 
symptom code.
1.  Verify System Preferences/Network settings 
are configured appropriately to support 
communication method.
2.  For ethernet connection issues verify that the 
cable being used functions when used with 
another known-good system.
3.   For wireless connection issues review user 
environment to determine...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 67 2010-11-24
Input/Output Devices
Apple Remote Inoperable
Unlikely cause:  LCD display, power supply, hard drive, optical drive, fans
Quick Check
SymptomsQuick Check
Apple Remote Inoperable
•  Apple Remote doesn’t bring up 
Front Row
•  Apple Remote doesn’t control 
iTunes
•  Apple Remote doesn’t control 
computer volume 1.
  Make sure you’re using the Apple Remote 
within 30 feet of the computer, and have an 
unobstructed...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 68 2010-11-24
4. After clicking “Unpair”, does the 
computer now respond to the 
Apple Remote? Yes
Pairing issue. Issue resolved.
No Possible IR board issue.  
Go to step 5.
5.   Open the Apple System Profiler. 
Selecting USB, do you see “IR 
Receiver” listed? Yes
IR Receiver reporting on USB 
bus. Check for lens block.  
Go to step 6.
No Inspect and reseat IR cable to 
IR board. If necessary, replace 
damaged IR cable. Go step 7.
6....

iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 69 2010-11-24
Deep Dive
CheckResultAction Code
1.   Verify that boot chime is 
present when system is 
powered on. Note: make sure 
audio output preferences are 
not set to mute. Yes
Go to step 2.
No Audio board not detected by 
system. Reseat audio board, 
then replace audio board if 
problem persists. M09
2.  Launch System Preferences and 
select Sound/Input options. 
Verify that system’s Internal 
Microphone is selected. Yes
 Go to...

iMac (20-inch, Early/Mid 2009) Symptom Charts — Input/Output Devices 70 2010-11-24
Audio: Built-in Speakers Have Distorted Sound
Unlikely cause:  LCD display, power supply, hard drive, optical drive, fans
Quick Check
SymptomsQuick Check
Audio: Built-in Speakers Have 
Distorted Sound
•  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 and the...