Apple imac 21 5 inch late 2009 User Manual

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 71 2010-11-18
3.  After cable has been replaced, 
verify if AirPort card is now 
listed in System Profiler. Yes
Issue resolved by replacing 
AirPort cable. X03
No Replace AirPort card carrier 
board and re-test. If issue 
persists (card not seen on 
bus), replace AirPort card. M11
4.
 Enable AirPort and verify if 
known local AirPort networks 
are available, or create a 
computer-to-computer 
network with another 
Macintosh computer using 
AirPort. See http://docs.
info.apple.com/article.
html?path=AirPort/5.0/en/
ap2110.html. Verify if you 
connect successfully. Yes
Issue resolved.
No Go to step 5.
5.   Check and reseat the two 
antennas to the AirPort card. 
Verify if you can connect to 
known AirPort network. Yes
Issue resolved.
No Replace AirPort card. If issue 
persists, replace AirPort 
antenna(s). If damaged 
antenna is the one embedded 
in rear housing behind Apple 
logo, replace rear housing. N04
6.  Verify that computer and 
Bluetooth device are both in 
discoverable mode. Verify if 
you can now successfully and 
reliably pair the device. Yes
Issue resolved.
No Replace Bluetooth antenna. 
Go to step 7. M11
7.   Re-test with new Bluetooth 
antenna and verify if Bluetooth 
issues are resolved. Yes
Issue resolved.
No Replace Bluetooth card. M11  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 72 2010-11-18
AirPort Card Kernel Panic
Quick Check
SymptomsQuick Check
AirPort Card Kernel Panic
•  Kernel Panic on startup
•  Kernel Panic or freezing while 
attempting to connect to WiFi 
networks
•  Kernel Panic while transferring 
data on WiFi networks 1.
  Isolate OS by starting up from original Install 
media for this computer, a same-model computer 
in Target Disk Mode, or compatible known-good 
OS on an external drive. AirPort and Bluetooth 
services are available when booted from the 
Install disk.
2.  Ensure that all software and firmware updates for 
the computer and AirPort been installed.
Deep Dive
Check ResultAction Code
1.   Disconnect AirPort card cable 
end from logic board. Verify if 
computer starts now without  
kernel panic. Yes
Reseat AirPort card cable and 
retest. If problem continues 
replace cable. Go to step 2.
No Kernel panic not related 
to AirPort. Restart from 
Install DVD or known-good 
bootable external drive and 
check Panic.Log file on user’s 
hard drive to find out which 
is the crashing I/O interface. 
Also troubleshoot installed 
Mac OS X software..
2.  With replacement AirPort 
card cable installed, verify if 
computer starts now without 
kernel panic. Yes
AirPort cable issue. Issue 
resolved. N13
No Replace AirPort card carrier 
board and re-test.  If issue 
remains, replace AirPort card. 
Go to step 3.
3.   With replacement AirPort 
carrier or card installed, verify 
if computer starts now without 
kernel panic. Yes
AirPort carrier or card issue. 
Issue resolved. N13
No Replace logic board. M11  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 73 2010-11-18
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.
  Verify if Ethernet cable is inserted into port 
correctly.  Check Ethernet cable for damage. Try 
a known good Ethernet cable – CAT5 or better 
recommended for 100Mbps+ connections.
2.  Check Ethernet ports on the computer and wall/
switch for dust, debris, damage or bent pins.
3.   Ensure distance from networking infrastructure is 
less than 300 feet/ 105 meters.
4.  Verify port, cable and network hardware with a 
known good system. Isolate firewall, MAC address 
filtering or hardware access control devices.
5.   Isolate OS by starting up from original Install 
media for this computer, a same-model computer 
in Target Disk Mode, or compatible known-good 
OS on an external drive.
Deep Dive
Check ResultAction Code
1.   Visually inspect Ethernet port 
of computer and ensure that all 
pins will make physical contact 
with the Ethernet cable. Yes
Go to step 2.
No Pins are damaged, bent flat or 
missing. Replace logic board. M24
2.  Boot from original Install media. 
Verify Network Link status is 
active by using Network Utility 
under the “Info” tab. Verify if the 
Link Status is “Active”. Yes
Go to step 3.
No If same Ethernet cable gives 
an “Active” link status on a 
known-good, same-model 
computer, replace logic board. M10
3.
  Connect computer to another 
Mac using CAT5 Ethernet 
cable. See article http://
docs.info.apple.com/article.
html?path=Mac/10.5/en/8429.
html. Verify if you connect 
successfully. Yes
Ethernet communication 
good. Go to step 4.
No If same Ethernet cable and 
computer connects to a 
known-good, same-model 
computer, replace logic board. M10  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 74 2010-11-18
4. Check for speed and duplex 
issues on network. Open 
System Preference > Network; 
click the Advanced button, 
then the Ethernet tab. Verify if 
the speed and duplex reported 
are what is expected. Yes
Go to step 5.
No
Change speed and duplex 
settings. See 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 
kBase #HT2532: Mac OS X 
10.4 or later: How to change 
the MTU for troubleshooting 
purposes. Verify if changing 
MTU settings on computer 
resolves issue.  Yes
Go to step 6.
No Ethernet controller damaged. 
Replace logic board. M10
6.  If changing speed, duplex 
or MTU settings allows 
connectivity, check with a 
known-good, same-model 
computer. Verify if known-good 
computer produces the same 
results. Yes
Check with ISP or Network 
Administrator concerning 
speed, duplex & MTU settings.
No Verify with known good OS. 
If issue persists, replace logic 
board. M10
Wireless Input Device Doesn’t Pair
Quick Check
Symptoms
Quick Check
Wireless Input Device Doesn’t 
Pair
•  Can’t get system to recognize 
Bluetooth keyboard or mouse 1.
  Remove and reinstall batteries for device.
2.  Check that device is powering on.
3.   Use known-good batteries with device.
4.  Ensure that device is being used within 30-foot 
range for Bluetooth devices.
5.   Ensure that the latest Software Updates have 
been applied.  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 75 2010-11-18
Deep Dive
CheckResultAction Code
1.   Without any wired input 
devices connected, and with a 
wireless mouse in discoverable 
mode, startup computer. Verify 
if computer shows Bluetooth 
Mouse Setup Assistant. Yes
Bluetooth hardware is active. 
Go to step 6.
No Go to step 2.
2.  Connect a wired mouse and 
run System Profiler. Verify if 
Bluetooth interface is listed 
under USB in System Profiler. Yes
Bluetooth hardware is 
present. Go to step 6.
No Remove glass and LCD panel, 
reseat both ends of cable 
between Bluetooth board and 
logic board. Go to step 3.
3.   Use an external monitor. 
Run System Profiler. Verify if 
Bluetooth interface is listed 
under USB in System Profiler. Yes
Bluetooth hardware is now 
present. Go to step 6.
No Replace Bluetooth cable.  
Go to step 4.  X03
4.  Run System Profiler. Verify if 
Bluetooth interface is listed 
under USB in System Profiler. Yes
Bluetooth hardware is now 
present. Go to step 6.
No Replace Bluetooth board.  
Go to step 5. M11
5.   Run System Profiler. Verify if 
Bluetooth interface is listed 
under USB in System Profiler. Yes
Bluetooth hardware is now 
present. Go to step 6.
No  Replace logic board. M11
6.  Run Software Update and 
apply any available Bluetooth 
updates. Activate Bluetooth 
in System Preferences (or 
Apple menu icon) then select 
“Configure a new Bluetooth 
device” (or run Bluetooth 
Mouse Setup Assistant). Verify if 
Bluetooth mouse is seen. Yes
Bluetooth discovery is now 
active. Go to step 7.
No Replace Bluetooth antenna. X03
7.   With a wireless mouse on, and 
in discoverable mode, verify 
if  you can successfully pair 
mouse with the assistant. Yes
Check for stability.  
Go to step 8.
No
Go to Wireless Input Device 
Loses Connection symptom 
flow.  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 76 2010-11-18
8. With wireless mouse paired, 
verify if mouse stays connected. Yes
Issue resolved.
No Inspect and reseat Bluetooth 
antenna cable. Replace a 
damaged antenna cable, or 
Bluetooth board if its antenna 
connector is damaged.  
Go to step 9.
9.   With wireless mouse paired, 
verify if mouse stays connected. Yes
Antenna issue. Issue resolved.
No
Go to Wireless Input Device 
Loses Connection symptom 
flow.
Wireless Input Device Loses Connection
Quick Check
Symptoms Quick Check
Wireless Input Device Loses 
Connection
•  Wireless keyboard, mouse, or 
other wireless input device 
loses connection.
1.  Remove and reinstall batteries for device.
2.  Check that device is powering on.
3.   Use known-good batteries with device.
4.  Ensure other devices pair and keep connection 
without issue. If not, see AirPort/Bluetooth 
Issues symptom flow.
5.   Ensure that device is being used within 30-foot 
range for Bluetooth devices.
6.  Ensure that the latest Software Updates have 
been applied.
Deep Dive
Check ResultAction Code
1.   Open System Preferences > 
Bluetooth. Paired items and 
their connection status are 
shown. Verify if device is listed. Yes
Device has been paired.  
Go to step 2.
No Device is not paired. Make 
device discoverable and open 
Bluetooth Setup Assistant.  
Go to step 3.  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 77 2010-11-18
2. Make sure device is on. 
In System Preferences > 
Bluetooth, select device and 
from the Action menu (gear) 
choose “Connect”. Verify if 
device connects successfully. Yes
Go to step 7.
No Delete pairing in System 
Preferences. Go to step 3.
3.   With the device on, run 
Bluetooth Setup Assistant. 
Verify if you can successfully 
pair the device. Yes
Go to step 7.
No Restart computer.  
Go to step 4.
4.  With device on, run Bluetooth 
Setup Assistant. Verify if you 
can successfully pair device. Yes
Go to step 7.
No Create a new Admin User.  
Go to step 5.
5.   Log into new Admin User 
account. With device on, run 
Bluetooth Setup Assistant. 
Verify if you can successfully 
pair device with new user 
account. Yes
User account issue. 
Troubleshoot software on 
User account. No hardware 
repair needed.
No Remove the following file: /
Library/Preferences/com.
apple.Bluetooth.plist 
Go to step 6.
6.  Restart computer, With device 
on, run Bluetooth Setup 
Assistant. Verify if you can 
successfully pair device. Yes
Go to step 7.
No
Go to AirPort/Bluetooth 
Issues symptom flow.
7.   With device paired and 
connected, verify if device 
connection is stable if used 
normally. Yes
Issue resolved.
No Check wireless device manual 
to verify if device is being 
used in accordance with 
manufacturer’s specifications 
(range, OS support, battery 
types). Go to step 8.
8.  Verify if device is performing to 
stated specifications. Yes
Educate user. Issue resolved.
No Replace wireless device.  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Communications 78 2010-11-18
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 cable 
being used functions when used with another 
known-good system.
3.   For wireless connection issues review user 
environment to determine whether possible 
interference from other 2.4GHz or 5GHz 
communications devices might be contributing 
to issue. See kBase #HT1365: AirPort and 
Bluetooth: Potential sources of interference for 
wireless devices and networks.
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 — Input/Output Devices 79 2010-11-18
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 Apple Remote is within 30 ft. of 
computer, and has an unobstructed line-of-sight 
to computer.
2.  Make sure lens end of Apple Remote is pointing 
directly at front of computer.
3.   Make sure “Disable remote control infrared 
receiver” checkbox in System Preferences > 
Security is not checked.
4.  Ensure that all software and firmware updates for 
this model have been installed to take advantage 
of any available bug fixes.
Deep Dive
Check ResultAction Code
1.   Open Photo Booth or iChat’s 
video preview window. Point 
Apple Remote at built-in 
camera and press any button 
on Apple Remote. Verify if a 
white, flashing light is visible in 
video preview. Yes
Apple Remote is functioning. 
Go to step 2.
No Replace Apple Remote 
battery. 
Go to step 3.
2.  Open System Preferences 
> Security. Verify if “Unpair” 
setting is available in this 
preference panel. Yes
Click “Unpair” button to 
disable possible pairing with 
another Apple Remote.  
Go to step 4.
No Possible IR board issue.  
Go to step 5.
3.   With replacement battery, 
verify if white flashing light 
is visible coming from Apple 
Remote in video preview 
window. Yes
Battery issue. Issue resolved. X05
No Apple Remote defective. 
Replace Apple Remote. X04  
						

							iMac (21.5-inch, Late 2009) Symptom Charts — Input/Output Devices 80 2010-11-18
4. After clicking “Unpair”, verify if 
the computer now responds to 
the Apple Remote. Yes
Pairing issue. Issue resolved.
No Possible IR board issue.  
Go to step 5.
5.   Open System Profiler. Verify if 
“IR Receiver” is listed in USB list 
of devices. Yes
IR board reporting on USB 
bus. Check for lens block.  
Go to step 6.
No Inspect and reseat IR cable 
connection to logic board.  
Go to step 7.
6.  Check that IR board is correctly 
fitted and aligned with Apple 
window and that lens is not 
blocked by any foreign material 
and re-test. Verify if computer 
responds to Apple Remote. Yes
Lens blocked or sensor not 
aligned with window. Issue 
resolved. X03
No Lens damaged or inoperable. 
Replace IR board. Go to step 7.
7.   After reseating or replacing 
IR board, verify if “IR Receiver” 
is listed under USB in System 
Profiler, and that computer now 
responds to Apple Remote. Yes
IR module reseated/replaced. 
Issue resolved. X03
No If IR board was only reseated, 
replace IR cable. Go to step 8.
8.  After replacing IR cable, verify 
if “IR Receiver” is listed under 
USB in System Profiler, and that 
computer now responds to 
Apple Remote. Yes
IR cable replaced. Issue 
resolved. X03
No Replace IR board. Go to step 9.
9.   After replacing IR board, verify 
if “IR Receiver” is listed under 
USB in System Profiler, and that 
computer now responds to 
Apple Remote. Yes
IR board replaced. Issue 
resolved. X03
No Replace logic board. M23