Apple M9032LL User Guide - Page 71

The LED lights on the logic board turn on. Your Power Mac G5 has up to seven LED lights on the top left side of the main logic board. If the LED lights illuminate, locate the light and use the information that follows to identify the cause: Note: LEDs 3, 4, and 5 illuminate only when the air deflector is not in place or it is not closed properly. Your Power G5 may not have an LED 6.  LED 1-CPU A: red-contact Apple or an Apple Authorized Service Provider  LED 2-Overtemp: red-contact Apple or an Apple Authorized Service Provider  LED 3-Power On: red-the main power is on  LED 4-Trickle: yellow-Power Mac G5 is plugged into the wall correctly  LED 5-Open Firmware good: green-no problem  LED 6-CPU B: red-contact Apple or an Apple Authorized Service Provider  LED 7-Checkstop: red-contact Apple or an Apple Authorized Service Provider Edge of main logic board LED #1 LED #2 LED #3 LED #4 LED #5 LED #6 LED #7 Top bank of DIMM slots (Bank 1) Problems With Software Important: To use Mac OS 9 applications with your computer in the Classic environment, you must install Mac OS 9 (see "Installing Mac OS 9" on page 75). To start the Classic environment, open a Mac OS 9 application or double-click a document that requires a Mac OS 9 application. Classic works in the background to access Mac OS 9 features and software applications. You have a problem with a software program.  Use Software Update to ensure that you have the latest drivers, bug fixes, and other updates.  For problems with software from a manufacturer other than Apple, contact the manufacturer. Chapter 5 Troubleshooting 71