Sega Master System II Motherboard Replacement

Flip the console on its back and unscrew the 5 screws marked on this photo.

Once you've unscrewed those 5 screws, flip the console upright again.

Once the console is upright, first gently pull the rear of the top up.

After the top is at an angle, gently remove it by pulling upwards.

Once the 2 halves are separated, it should look something like this.

Next step is the removal of the RF shield.

There are 7 screws in total, please unscrew those.

The blue marked screw is shorten than the other 6 screws, this screw has to be put back in the exact same location during reassembly.

Carefully lift the RF shield up, left side first.

See the note in the previous step.

Now we have a complete view of the motherboard, thus coming to the last step.

For this step you only need to remove 3 remaining screws.

2 screws on the connector.

There's 1 shorter screw as previously with the RF shield. This small screw keeps the voltage regulator in place.

When you've disassembled everything, it should look like this.