Mac mini (PowerPC) PRAM Battery Replacement

System

Last updated on September 17, 2016

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No estimate

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Moderate

Difficulty rating: Moderate. Follow instructions carefully to succeed.

Introduction

Go to step 1

The time and date, as well as other settings, are kept by the PRAM battery when your machine is off. Replacement battery is a CR2032 3v lithium button cell.

What you need

Tools

• 1.5" Thin Putty KnifeAvailable for sale on iFixit
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• Phillips #0 ScrewdriverAvailable for sale on iFixit
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Step 1 Mac mini (PowerPC) PRAM Battery Replacement

• You can skip this step if you bought your . Putty knives purchased from iFixit come with pre-ground edges.
• You'll need a putty knife in order to open the case. A 1.5 inch thin putty knife will work well, but you'll want to grind the edge down. Rub the putty knife's short edge back and forth on a sheet of all purpose rough grit sandpaper (100 grit will work fine) until it attains a beveled edge.
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Step 2

• Place the mini upside down on a cloth and turn it so that the apple leaf faces you.
• Insert the putty knife into the seam between silver outer case and the white plastic. If you have trouble, you can insert the putty knife at an angle or grind the knife's edge down further. Push the blade down until you meet firm resistance (roughly 3/8 of an inch).
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Step 3
• Pull directly back on the putty knife until the white plastics pops up. Don't worry about bending the putty knife too far or breaking the plastic tabs. Just continue to pull back on the putty knife until the case pops free.
• Repeat this procedure on the other side.
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Step 4
• Grasp the white lower case beneath the vent and rotate it up and away from you, pulling it free of the upper case.
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Step 5
• If your mini does not have Airport installed, then skip this step.
• Grasp the Airport antenna board and lift it off of the two plastic posts holding it in place. You may need to push back the black plastic tab jutting through the lower left corner of the board.
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Step 6
• Remove the yellow tape securing the power button cable to the black plastic framework.
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Step 7
• Remove the three black Phillips screws securing the plastic framework to the logic board and lower case.
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Step 8
• Grasp the optical drive and mass storage unit in one hand and lift up enough so that you can see beneath it.
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Step 9
• If your mini has neither an Airport card nor a Bluetooth board, you can simply lift the optical drive up and away. Otherwise, you need to disconnect the Airport and/or Bluetooth antenna cables first.
• With your free hand, pull the Bluetooth cable up from Bluetooth board and unplug the Airport antenna cable from the right of the Airport card. Caution: both of these connections are very small. When re-assembling unit after repair, you may want to remove the two screws holding the airport card to the assembly and lift the card up and out to re-attach the cables.
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Step 10
• Push the PRAM battery in and pull it up. You'll have to push the battery in further than you'd expect in order to get it to pop free.
• When inserting the new battery, make sure the side with writing along the edges faces the black plastic holder. You should also insure that the metal connectors make contact with the battery (you can bend them forward if they do not).
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Author

System

Member since: 09/24/09

2,562 Guides authored

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