Apple iMac G5 Memory, 17-inch Specifications Page 131
- Page / 161
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
iMac G5 (17-inch iSight) Troubleshooting — Symptom Charts 131
Audible buzzing, whining, or ticking noise
The iMac G5 (iSight) contains several mechanical devices such as motors and fans that may make
audible buzzing, ticking, or whining noises when they are operating in a normal manner. The
sounds will vary depending on how the system is used.
When troubleshooting abnormal noises try the following:
Verify that the computer is running a supported version of the Mac OS X operating system.
If an earlier version of the operating system has been installed then the fans may run at
excessive speeds.
Determine that this noise is related to the computer by removing and shutting down all
other devices in the vicinity of the computer that could be causing a sound.
Eject any media inserted into the optical drive. The optical drive will make a variety of normal
sounds when accessing the optical media.
Quit all applications and test the computer again. Processor-intensive applications may cause
the fans to run at a higher RPM and therefore be more audible.
Boot to Apple Service Diagnostic v 2.6.3 (or later) Open Firmware partition and run the test
suite. The diagnostic tests fan speeds and thermal sensor functionality. Should tests fail,
eplace any parts indicated by the diagnostic.
Reboot the computer and check the computer again. If the noise persists and is unusually
loud, contact Apple Technical Support.
Verbose Startup Mode
Installing an iMac G5 logic board from service inventory may cause the computer to start up
in verbose mode. In subsequent startups, the Mac OS will start in it’s usual manner. When the
computer starts in verbose mode, it does not indicate an issue with the logic board.
Prevent this behavior by resetting the PRAM when you rst start the computer after installing the
new logic board.
1.
2.
3.
4.
5.
6.
- Service Source 1
- Contents 2
- Take Apart 2
- Screw Chart 160 4
- What’s New? 7
- Orientation 7
- Serial Number Location 7
- Opening the Computer 10
- Access Tool Modication 10
- EMI Shielding 13
- Lower EMI Shield 14
- Access Door and Memory 16
- Front Bezel 19
- Replace the Front Bezel 24
- Camera Board 26
- Replace the Camera Board 27
- Remove the Lower EMI Shield 29
- Replace the Lower EMI Shield 29
- IR Board 30
- Remove the IR Board 31
- Replace the IR Board 31
- Remove the LCD Display 33
- Replace the LCD Display 37
- TMDS Cable 39
- Remove the TMDS Cable 40
- Replace the TMDS Cable 41
- Inverter 42
- Remove the Inverter 43
- Replace the Inverter 45
- Remove the Speakers 47
- Replace the Speakers 48
- Remove the CPU Fan 50
- Replace the CPU Fan 50
- Remove the Optical Drive 52
- Replace the Optical Drive 60
- Remove the Hard Drive 62
- Replace the Hard Drive 66
- DC-DC Board 67
- Remove the DC-DC Board 68
- Replace the DC-DC Board 69
- Power Supply 70
- About the Power Supply 71
- Remove the Power Supply 72
- Replace the Power Supply 73
- Logic Board 74
- Remove the Logic Board 75
- Replace the Logic Board 80
- Optical Drive Fan 82
- Remove the Optical Drive Fan 83
- Replace the Optical Drive Fan 83
- Hard Drive Fan 84
- Remove the Hard Drive Fan 85
- Replace the Hard Drive Fan 85
- AC Power Inlet 86
- Remove the AC Power Inlet 87
- Replace the AC Power Inlet 89
- Ambient Light Sensor Board 90
- Remove the Clutch 96
- Replace the Clutch 98
- Wireless Antenna 99
- Part Location 100
- Remove the Wireless Antenna 100
- Replace the Wireless Antenna 102
- DC Power Cable 103
- Remove the DC Power Cable 104
- Replace the DC Power Cable 105
- Camera Cable 106
- Remove the Camera Cable 107
- Replace the Camera Cable 108
- Preliminary Steps 110
- Remove the Chassis 111
- Replace the Chassis 112
- Rear Housing 114
- Troubleshooting 115
- General Information 116
- Accessing the Diagnostic LEDs 117
- Testing Under Power 123
- SMU (System Management Unit) 125
- DDR Memory 126
- Symptom Charts 127
- Power Issues 128
- Verbose Startup Mode 131
- No Video 132
- LCD Display 135
- Hard Drive 136
- Optical Drive 137
- Discs won’t insert 140
- Fan Sound 142
- AirPort/Bluetooth 145
- IR Remote 147
- IR Sensor/Receiver 148
- Built-in iSight Camera 149
- Audio Quality Poor 150
- Speakers 151
- No: Replace the speakers 152
- My mouse doesn’t work at all 153
- Keyboard 154
- Error Beep(s) 155
- A USB device doesn’t work 156
- Screw Chart 160
Related products and manuals for All-in-One workstations Apple iMac G5 Memory, 17-inch
(20 pages)LG MS-254S manuels
Manuels d'utilisation et guides de l'utilisateur pour Micro-ondes LG MS-254S.
Nous fournissons des manuels en pdf 1 LG MS-254S à télécharger gratuitement par type de document : Manuel de l'utilisateur
Comments to this Manuals