High noise level with Power Mac G Mirrored Drive Doors computer

Note The sound generated by the Power Mac G4 (Mirrored Drive Doors) computer is approximately the same as previous dual processor computers. Customers who upgrade from earlier, single processor computers might notice that the computer is louder. This is because there are more parts to cool multiple processors and additional expansion capabilities within the same form factor. However, there are some situations that may lead to increased sound levels beyond what is expected. One is addressed with...

No sound from computers internal speaker

Disconnect any microphones or external speakers. 2. Verify the volume is set appropriately in the Sound system preference or Sound control panel and mute is not checked. 3. Clear parameter RAM. Hold down Command-Option-P-R during startup until you hear a second startup chime. 4. Verify the speaker cable is plugged into the logic board. 5. Plug headphones into the headphone jack. If you don't get sound via the headphone jack, try connecting external speakers to the audio line-out port on the...

Clicking or clunking type noise heard from Power Mac G Mirrored Drive Doors computer

This noise is due to the fan blades hitting the gasket that surrounds the air intake openings. 1. Check that the noise is coming from the power supply fans by briefly disconnecting the processor fan and optical bay fan. Important Do not close the door and operate the computer with these fans disconnected. 2. If the noise is coming from the fans, replace the power supply. Note Service stock does not contain any power supplies with this issue. Related Knowledge Base article 86128 Power Mac G4...

Before Replacing the Processor

Mirror Drive Door Motherboard

Important Apple has determined a compatibility issue between the processor and certain fabrication levels of the logic board on some Power Mac Server G4 Mirrored Drive Doors and Power Mac G4 Mirrored Drive Doors products. Before ordering a replacement processor for those models, follow these steps 1. Open the computer and check the fabrication number that is printed on the logic board. The fabrication number is easily visible at the edge of the board near PCI card slot 5. 2. If the logic board...

USB printer does not operate

Verify that connections to the printer and computer are secure. 2. Switch the printer to a different USB port. If the printer operates correctly, the first port was bad. Replace the logic board. Note You can also use Apple System Profiler to verify USB ports. 3. Verify the correct versions of the system software and printer driver are installed. 4. Use Print Center to verify that you have the correct printer selected. 5. If the printer is connected to a third-party USB hub, switch it to one...

Optical drive tray wont open

Power Mac Disc Drawer

Before opening the computer, try the following Note When following the steps below make sure that there is power to the computer and to the Apple Pro Keyboard and Apple Pro Mouse. Press the Eject key on Apple Pro Keyboard. To open the second optical drive on a Power Mac G4 Mirrored Drive Doors computer, press Option-Eject on the Apple Pro Keyboard. Open the Eject application found in the Eject Extras folder. The Eject Extras folder is located in the Apple Extras folder on the CD. Click the...

Block Diagram

Phy Powered Whenever AC Power Available Phy Powered Whenever AC Power Available FireWire 100 200 400 800 Mbps , ' ' ' PCI Interface 33MHz, 64 bit 1024kB ROM Contains Open Firmware Hardware INIT POST AGP-4x Interface 66 133 266 MHz 32 bit AGP-4x Interface 66 133 266 MHz 32 bit 4 DDR SDRAM DIMM Slots Up to 2048MB using Industry Standard 512MB DIMMs AGP-4 Bus PCI 0 66 133 266MHz, 32bit Rear Panel 1 8 Line In and Line Out Connectors Front Panel rnPW 1 8 Headphone Rear Panel Apple Pro y PjJC...

Power Supply Verification

To power on, the computer's logic board requires a trickle power of 5V. If the system fails to power on, first reset the PMU. Then follow the procedure outlined below to determine whether the problem is related to the power supply. Note To verify the power supply, you need a volt meter. When connecting the volt meter leads to specific pins, make sure the power supply remains securely plugged into its connector on the logic board. The following figure shows the pins and voltage on the computer's...

Mirrored Drive Door

Repairing Broken Handle Powermac

Remove the two Phillips screws attaching the right side panel to the metal chassis. 4. Using needlenose pliers, squeeze the plastic tabs protruding through the chassis , to release the right side panel from the metal chassis. 5. Remove the right side panel from the chassis. 5. Remove the right side panel from the chassis. Replacement Note When installing the replacement right side access panel, make sure the latch is closed, and the metal latch spring pin inside the chassis fits under the...

Flashing question mark appears on the screen

Start up from the system restore CD and check to see if the hard drive shows up in the Disk Utility. If it does, go to step 2. If it does not, go to step 4. 2. Run Disk Utility. Update the driver and restart the computer. 3. Reinstall system software using the system restore CD that came with the computer. 4. If you are starting up in Mac OS 9, turn off your Mac OS 9 system extensions Start up the computer while holding down the Shift key. If the computer is set to start up from another...