User Guide

6 - Power Mac G4 Cube Troubleshooting
General Information
Three Flashes: Incompatible memory types are installed (for example both
SDRAM and EDO installed)
Install compatible memory, as follows:
1. Shut down the computer by holding down the power button (about 5 sec.) until it shuts
off. Then remove the power cord from the computer.
2. Remove the computer core.
3. Rotate the core so you can see the memory slots.
4. Install compatible memory. Refer to the Power Mac G4 Cube owner's manual which
discusses the type of memory that is compatible with the computer. You can also refer
to http://www.apple.com/guide/, and Knowledge Base article 58776: "Power Mac G4
Cube: Memory Specifications".
5. After installing memory, reassemble the computer and test for the symptom.
Four Flashes: No memory banks passed memory testing
Either the memory or the memory slots need replacement, as follows:
1. Shut down the computer by holding down the power button (about 5 sec.) until it shuts
off. Then remove the power cord from the computer.
2. Remove the computer core.
3. Rotate the core so you can see the memory.
4. Remove all the memory.
5. Check to make sure there are no bent pins in the memory slots.