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Step 13
Use one hand to pull back the speaker cable and use your other hand to lift the optical drive up and out of the computer.
Step 14 — PRAM Battery
Disconnect the PRAM battery cable from the bottom right corner of the logic board.
Step 15
Use a spudger to pry up the PRAM battery from its housing on the left speaker assembly.
Congratulations! You have now removed your item. To reassemble simply follow the directions in reverse order.