Preliminary Steps Whq
Place the computer face down on an ESD mat. Remove the user access door. 1. Disconnect the RJ-11 cable 1 from the top of the modem. Remove the two modem screws 2 and gently pry the board off its connector.The board is fragile pry the board from the top and bottom. Replacement Note When replacing the modem, don't apply pressure to the middle of the board. The board should be pressed into place by holding the modem by the top and bottom.
Preliminary Steps Rya
Place the computer face down on an ESD mat. Remove the user access door. Remove the digital assembly. Remove the hard drive carrier Remove the AirPort Extreme Card if present 1. Disconnect the optical data cable, the optical power cable and release the heatsink clip. Note On education models the optical cables are not present because there isn't an optical drive. 2. Remove the down converter screw that attaches to the chassis frame. 3. On the left side, disconnect the power button cable and...
Preliminary Steps Hze
Place the computer face down on an ESD mat. Remove the user access door. Remove the digital assembly. 1. Remove the four screws along the back of the metal chassis. Note The two outer screws are fine thread screws. 2. Gently unhook see circle and lift the hard drive carrier up and off the chassis. Flip the drive carrier over to access the data and power cables. 3. With the drive carrier flipped over 1 , disconnect the data cable 2 and the power cable 3 from the hard drive. 4. To remove the...
Removing the Installed Card
1. Untuck the clear plastic tab on the AirPort Extreme card. Figure 3 Figure 3 2. Pull the AirPort Extreme card out of the slot a little bit to access the antenna cable. Figure 4 3. Disconnect the AirPort Extreme cable from the port on the card, then completely remove the card from the slot. Figure 5
Logic Board Battery
Important Apple highly recommends removing the battery when handling the logic board. Make sure to use proper ESD protection when handling modules. The battery on the logic board controls the stored system settings, such as date and time. It is only necessary to test the battery when you can't power on the computer, or the date and time are reset every time the AC power is removed. The battery is also used to power the PMU chip because the PMU chip keeps time and must always be running when the...
IO Ports
The ports listed from left to right are The PMU Power Management Unit is a micro controller chip that controls all power functions for the computer. The PMU is a computer within a computer. It has memory, software, firmware, I O, two crystals, and a CPU. Its function is to Tell the computer to turn on, turn off, sleep, wake, idle, etc. Manage system resets from various commands. Maintain parameter RAM PRAM . Manage the real-time clock. Important The PMU is very sensitive and touching the...
Whats New April
Apple announced a revision to the eMac product family. Powered by G4 processors running at up to 1.25GHz, with a system bus of 167 MHz, the new eMac models come with Mac OS X v.10.3 and include Apple's iLife application suite, providing iMovie, iPhoto, and iTunes as a standard software configuration. No-optical drive configuration This computer is available in a low-cost no-optical drive configuration Modem except for the educational configuration, the eMac USB 2.0 has an internal, fax modem...
Preliminary Steps Pla
Place the computer face down on an ESD mat Remove the user access door Remove the digital assembly Remove the AirPort Extreme Card If you remove everything listed in the steps above, you are left with the display analog module. There is nothing more to remove from this module. Note The display analog assembly contains a non-switching power supply which is preset at a 220V configuration.The voltage selection needs to be manually set by the way of a voltage jumper. This means if you are...
No sound from either internal or external speakers
1. Verify volume setting is correct in system preferences. 2. Verify the computer is not set to mute. Press the mute key on the Apple keyboard. 3. Reset parameter RAM. Press Command-Option-P-R during startup. 4. Boot from Apple Hardware Test hold down the C key at startup . Run both quick and extended tests. Proceed based on any error codes given. See AppleCare Knowledge Base article 112125 - Service Diagnostics Matrix for Error Code information. 5. Test the computer with known-good headphones....
Flashing question mark appears on the screen
1. Boot from the system CD that came with the computer and see if the hard drive mounts on the desktop. 2. Boot from Apple Hardware Test hold down the C key at startup . Run both quick and extended tests. Proceed based on any error codes given. See AppleCare Knowledge Base article 112125 - Service Diagnostics Matrix for Error Code information. 3. If no hard drive is found in Drive Setup, verify the hard drive cable connections. 4. Replace the hard drive cable. 5. Reinstall the software drivers...
Hard drive does not spin
1. Disconnect any connected peripherals. 2. Boot from Apple Hardware Test hold down the C key at startup . Run both quick and extended tests. Proceed based on any error codes given. See AppleCare Knowledge Base article 112125 - Service Diagnostics Matrix for Error Code information. 3. Launch Drive Setup and update the hard drive driver. 4. If no hard drive is found in Drive Setup, verify the hard drive cable connections. 5. Replace the hard drive cable.