Specifications
iMac G5 (17-inch iSight) Troubleshooting — Symptom Charts 128
Power Issues
No Power.
The iMac G5 will not turn on. The display has no picture or color and no sounds can be heard
coming from the fan or hard drive.
Verify that the power outlet is good. Plug a dierent device into the socket to ensure there is
power, or plug the iMac G5 into another outlet.
Check the power cord. Use a known good power cord.
Check the connection of the power cord on both ends. Verify that the power cord is securely
plugged into both the AC outlet and the back of the computer.
Remove the keyboard, mouse, and other peripherals such as external speakers, memory
cards connected to the card reader, and FireWire or USB devices. Try starting up the
computer with these devices removed. If the computer starts up, re-connect the peripherals
one at a time until you determine which device is causing the “no power” symptom.
Remove the front bezel to access the diagnostic LEDs on the main logic board. See
“Accessing the Diagnostic LEDs” in this chapter for complete instructions on this procedure.
With the front bezel removed, locate LEDs 1 through 4 on the main logic board. As shown
below, black tape covers the diagnostic LEDs and must be peeled back.
Replacement Note: Be sure to replace the tape when nished troubleshooting to prevent
light from leaking through the front bezel.
1.
2.
3.
4.
5.
6.