Specifications

iMac G5 (17-inch iSight) Troubleshooting — General Info 123

Testing Under Power

Using the diagnostic LEDs to check for power issues reuquires powering on the system with

the diagnostic LEDs visible. To access the Diagnostic LEDs, follow the preceding steps under

“Accessing the Diagnostics LEDs.” Never remove components not included in the “Accessing

the Diagnostic LEDs” procedure when testing the system under power.

WARNING: HIGH VOLTAGE

The AC/DC power supply board is a high voltage source with the unit under power, and remains

powered up whenever the system is plugged in, whether or not the system is turned on. Use

extreme caution when troubleshooting the system with the front bezel removed.

Disconnect power to the system before performing maintenenace.

Don’t work alone. In the even of an electrical shock it is important to have another

individual present who can provide assistance.

Keep one hand in your pocket when working on any iMac G5 (iSight) that is plugged in.

This will help ensure that your body does not provide a path to ground in the event that

you accidentally make contact with the line voltage.

Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a risk

if they accidentally make contact with the power supply circuitry.

To power on the computer with the diagnostic LEDs visible:

Follow the steps in the “Accessing the Diagnostic LEDs” procedure.

Stand up the computer—return it to an upright position.

Plug in the power cord.

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