Hard Drive

Internal hard drive runs continuously 1 Update driver software of hard drive using HD-SC Setup. 5 Replace logic board. Retain customer's SIMMs. Internal hard drive does not operate 4 Replace logic board. Retain customer's SIMMs. CD-ROM drive does not accept a compact disc Macintosh does not display CD-ROM drive icon Compact disc won't eject from the drive 1 Exchange disk (if disk is dirty or damaged). 2 Replace CD-ROM drive mechanism. 1 Verify that CD-ROM extension is in System Folder. 2...

Fan

Before you begin, remove the top housing. Caution Review the ESD precautions in Bulletins Safety. Note The fan is present only in the 7100 80 and 7100 80AV models. 1 Turn the computer chassis on its side so that the hard drive is facing up. 2 Disconnect the SCSI power cable from the fan cable. Caution When removing the fan, be careful that you don't knock the heat sink or damage the DRAM chips on the logic board. Grasp the fan and gently pull down and out on the fan to release it from the metal...

Battery Replacement

Before you begin, remove the following Awarning If handled or discarded improperly, the lithium battery in the computer could explode. Review battery handling and disposal instructions and ESD precautions in Bulletins Safety. Using a small flat-blade screwdriver, pry open the latch at the end of the battery holder and lift off the cover. 2 Grasp the battery and remove it from the holder. 3 Return the battery to Apple for proper disposal. For information on battery packaging and labeling, refer...

Troubleshooting Tips

When troubleshooting Power Macintosh systems, keep in 1 If a Power Macintosh system does not power up, you should first attempt to reset the logic board. Instructions are provided in the Additional Procedures chapter. 2 With Power Macintosh computers, you must install noncomposite RAM SIMMs only, and the RAM SIMMs must be installed in like pairs (that is, the same size and speed). Additional troubleshooting information is provided in the Symptom Charts section of the Troubleshooting chapter...

Logic Board

Before you begin, remove the following 1 Remove the customer's RAM SIMMs and 256K cache SIMM before returning the logic board to Apple. Note Grasp the cache SIMM by its corners and pull up firmly to remove it. Note The connectors for the cache and ROM SIMMs are functionally the same, and the ROM and 256K cache SIMMs may be installed in either connector. Be sure you remove the cache SIMM and not the ROM SIMM. The 256K cache SIMM has five chips on each side. 2 Remove the screw in the center of...

Memory

RAM 8 MB RAM soldered on logic board, expandable to 136 MB via 4 SIMM sockets on logic board using pairs of same size, 80 ns or faster, 72-pin noncomposite SIMMs 16 MB configuration has two 4 MB SIMMs installed Note SIMMs must be installed in pairs of the same size and speed. Install noncomposite SIMMS only. 1 MB, expandable to 2 MB using four 256K VRAM SIMMs 32K of on-chip cache optional 256K level 2 cache available 32K of on-chip cache 256K level 2 cache standard CMOS custom chip with...

Processor

Built-in MMU and FPU 32K of on-chip cache memory 66 MHz PowerPC 601 RISC microprocessor Requires system software version 7.1.2 or later 7100 80 80 MHz PowerPC 601 RISC microprocessor Requires system software version 7.5 or later Note To run System 7.5 on the Power Mac 7100 80, you must install enabler version 1.1.1 or later. This version of the system software, which ships with the unit, requires Finder version 7.1.5. You can verify that you have the correct Finder version installed by using...

Power Supply

Before you begin, remove the top housing. Caution Review the ESD precautions in Bulletins Safety. If a CD-ROM drive is installed, squeeze its side tabs and pull the drive out an inch or two to more easily reach the power supply. If there is a power supply strap installed on the unit, squeeze on the two ends of the strap and push it through the metal opening to remove it. Note The power supply strap is part of the shipping packaging for some power supplies. When replacing the power supply you...

CDROM Drive

Cables Rom Drive

Before you begin, remove the top housing. Caution Review the ESD precautions in Bulletins Safety. 1 Squeeze the side tabs and pull the drive out a few inches to more easily perform the next step. Disconnect these cables from the CD-ROM drive 4 Remove the drive rails and EMI shield from the CD-ROM drive. connectors on the SCSI data cable are keyed. You may need to twist the cable to insert the connector properly.

Video Card

Before you begin, remove the top housing. Caution Review the ESD precautions in Bulletins Safety. Caution Pull up evenly on both sides of the video card to avoid bending the connector pins, and remove the card from the expansion slot. When replacing the card, do not force it into the expansion slot. If the card does not seat properly, remove it and try again.

Drive Chassis

Power Rom Audio

Before you begin, remove the following If a CD-ROM drive is installed, disconnect these cables Remove the two drive chassis screws. Lift the front of the drive chassis until the chassis is perpendicular to the bottom case. Note The chassis swivels where the chassis tabs meet the bottom housing. 5 Guide the chassis tabs out of the slots in the bottom housing and remove the chassis. Replacement Note Carefully seat the bottom corners of the drive chassis into the Drive Chassis guides in the bottom...

Power Macintosh Upgrade

Power Macintosh 7100

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Note The Power Macintosh 7100 66 Upgrade Kit for the Centris 650 or Macintosh Quadra 650 includes a Power Macintosh 7100 66 logic board, top housing, bottom chassis, 1.4 MB manual insert floppy drive, video card, SCSI power cable, and CD-ROM EMI shield. Disconnect the following cables from the old logic board and reconnect them to the new board CD-ROM audio cable if present Note You may find it easier...