Apple emac ati usb2 2005 Servicehandbuch

6 - eMac ATI Graphics/USB 2.0/2005 Troubleshooting

 General Information

1.

To quickly identify the eMac (ATI Graphics) computer from t he original eMac, look at the user access 

door on the back of the computer. The user access door on the eMac (ATI Graphics) computer is white. 

The original eMac has a silver user access door. 

2.

There are two new logic boards with faster processors: 661-2854 (1GHZ) with EEE code NMA and the 

661-2853 (800 MHz).

3.

The eMac (ATI Graphics) uses the AirPort Extreme Card for wireless networking. The original AirPort 

card can not be used in this computer. Previous models of eMac used the original AirPort card. For 

compatibility information, see AppleCare Knowledge Base article 107440: AirPort Extreme Card: 

Compatible Macintosh Computers. 

4.

Note: The AirPort Extreme Card can not be used under Mac OS 9. 

5.

The 

PMU reset button is in a new location. Refer to the topic, “The PMU Chip” or “How to 

Reset the PMU on the Logic Board” in this chapter.

6.

The digital module assembly has been redesigned allowing easier removal and access to the optical 

drive without removing the digital module.

7.

The heatsink has been redesigned.

8.

The voltage jumper and LHR jumper are in new locations on the digital/analog assembly. Refer to 

“Display/Analog Voltage Setting and LHR Module Instructions” in this chapter for more information. 

9.

The hard drive carrier has one thermal pad and two rubber bumpers on the top side of the carrier. On 

the underside of the carrier there are two EMI pads. If you replace the carrier, these pieces come with 

the replacement carrier and need to be attached before inserting the hard drive.

10. The power button of the eMac (ATI Graphics) replaces the power reset button and programmer's 

switch (NMI button, also known as a NMI or nonmaskable interrupt button). You can use the power 

button for the following functions: 

 

Press the power button for 1 second to put the computer to sleep. To wake the computer 
from sleep, press the power button for less than one second or press any key on the 
keyboard. 

 

To shut down the computer, select Shut Down from the Apple menu (Mac OS X) or from the 
Special menu (Mac OS 9). You will be prompted to save any unsaved documents. 

If the computer is unresponsive, you can force the computer to shut down by pressing the 
power button and holding it for at least 5 seconds. Important: Information in any unsaved 
documents may be lost. 

 

From time to time, Apple has provided firmware updates to address certain issues that