PlayStation 2 Slimline CMOS Battery Replacement

Introduction

The Sony PlayStation 2 Slim relies on a CMOS battery, essentially a modified battery designed to power the CMOS chip in the hardware. This chip is responsible for storing boot settings, system time, and date. A faulty CMOS battery can cause faults in game saves, incorrect system time, or prevent the system from powering up.

What you need

Step 1 CMOS Battery

PlayStation 2 Slimline CMOS Battery Replacement, CMOS Battery: step 1, image 1 of 2

PlayStation 2 Slimline CMOS Battery Replacement, CMOS Battery: step 1, image 2 of 2

Remove all five screws on the downside of the PS2 Slimline
Underneath the "Do not remove" sticker, there will be one last screw

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Step 2 Remove the plate

PlayStation 2 Slimline CMOS Battery Replacement, Remove the plate: step 2, image 1 of 2

PlayStation 2 Slimline CMOS Battery Replacement, Remove the plate: step 2, image 2 of 2

Using a metal spudger, carefully pry open the chassis
Although a metal spudger is used in the tutorial, it is recommended to use plastic spudgers with most electronics as metal on metal can short circuts

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Step 3 Remove the Battery

PlayStation 2 Slimline CMOS Battery Replacement, Remove the Battery: step 3, image 1 of 3

PlayStation 2 Slimline CMOS Battery Replacement, Remove the Battery: step 3, image 2 of 3

PlayStation 2 Slimline CMOS Battery Replacement, Remove the Battery: step 3, image 3 of 3

Locate the battery on the motherboard. The battery will be a CR2032 Button Cell Battery
Carefully use a metal spudger to pull the battery out of the metal housing
Once the battery is fully removed, remove the connector upwards from the motherboard
The connector does not have any clips and can be easily removed and pushed back in with reassembly/disassembly