Introduzione

Removing an old or broken PRAM battery.

  1. OUjX5HuFT2cfryyU
    • Unplug all the cables from the computer, including the power cable. Lay the computer face-down, supporting the neck and base with a soft cloth under the screen.

  2. FfaEvPGVgaNLEnsS
    • Loosen the four Phillips #0 screws.

  3. cPqrwIQjjVBCTxFY
    • Carefully remove the base access panel.

  4. uNyPvDfLqBUrw6DH
    uNyPvDfLqBUrw6DH
    r3AuxS1INr2ABjcd
    • Remove the four 25mm T-15 screws.

  5. EHMSy4KmMMoS6VUj
    EHMSy4KmMMoS6VUj
    3kjS3QkLCpJyEYoh
    • Open the housing plate.

    • Be gentle with the wires still connected to the logic board so as not to ruin the cables.

    • A fixed plug connector between the logic board and upper unit will cause some resistance. Pull gently but firmly.

  6. G6IQQDrRLaAkjQhX
    G6IQQDrRLaAkjQhX
    OnuSBs4fLCuI5qar
    • Gently remove the battery from its holder using the plastic opening tool.

    • Insert new battery.

    • Clean and re-apply thermal paste to the heat sink areas circled in orange. See Step 15 in iMac G4 17" Model M9168LLA Hard Drive Replacement for better photos and description.

Conclusione

To reassemble your device, follow these instructions in reverse order.

Justin

Membro da: 05/10/11

303 Reputazione

7 commenti

We are not allowed to use screwdrivers to pry open stuff. Unfortunately, that is exactly what we did in step 6 of Dissasembling the back up battery

David Hunter -

Don't you need to replace the thermal paste?

adoug27 -

Yes you do in the areas circled in orange. I'd also recommend changing the paste under the heatsink itself as that will probably be dried up.

yotoprules -

I love my very first Mac ever, it is still working. After a couple of time living with its amnesia (forgot time and what else…) I’ve decided to replace the battery. Thanks for this helpful article. It made it easy to me to replace the battery.

Roland Brezina -

Good guide ! less than 20 minutes to change the battery, cleaning the interior included !!

SURIN Dominique -

Any thoughts? I replaced the battery and reapplied the thermal grease. iMac still won’t turn on.

Jessica -

Did you check voltage of the new battery? Should be 3.6v.

Otherwise it could be a logic board or PSU problem.

yotoprules -