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Introduction

A guide to remove the Logic Board from the Sega Dreamcast.

What you need

Step 1 Expansion Bay

Sega Dreamcast Logic Board Replacement, Expansion Bay: step 1, image 1 of 2

Sega Dreamcast Logic Board Replacement, Expansion Bay: step 1, image 2 of 2

Verify that the console is disconnected from the AC outlet before you begin.
Flip the console over on its back.
Take note of your model number, in case replacement parts are needed.

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Step 2

Sega Dreamcast Logic Board Replacement: step 2, image 3 of 3

Remove the expansion bay by applying pressure to the small clip on the expansion bay while prying it away from the console.

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Step 3 Top Cover

Sega Dreamcast Logic Board Replacement, Top Cover: step 3, image 1 of 1

Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.
Note: Remove the expansion bay to locate the fourth screw

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Step 4

Internal components can be loose. Be careful that they do not fall out when removing the cover.
Turn the console right side up.
Remove the top cover by gently lifting the upper portion of the console.

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Step 5 Power Block (Power Supply)

Sega Dreamcast Logic Board Replacement, Power Block (Power Supply): step 5, image 1 of 2

Sega Dreamcast Logic Board Replacement, Power Block (Power Supply): step 5, image 2 of 2

Verify that the console is disconnected from the AC outlet before you begin. If you have just powered off the system, give the capacitors a few minutes to discharge before you begin working.
Remove the white female pin header by clamping the clip and pulling it up gently from the power board.

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Step 6

Remove the two 10mm Philips #02 screws that are fastened to the power block.

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Step 7

Do not bend the male pin header between the mounted head when you remove the power supply from the chassis.
Remove the power board by using both hands to gently lift the power board away from the console.

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Step 8

Remove the clear plastic film that is tucked between the power supply and the chassis.

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Step 9 Controller Port

Sega Dreamcast Logic Board Replacement, Controller Port: step 9, image 1 of 2

Sega Dreamcast Logic Board Replacement, Controller Port: step 9, image 2 of 2

Be gentle with the white controller cable as it can be a bit fragile.
Disconnect the white controller cable by gently pulling the the cable while wiggling it back and forth until it detaches from the controller board.

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Step 10

Remove the four 14mm Philips #02 screws located on the controller board.

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Step 11

Disconnect the white fan header from the controller port.

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Step 12

Remove the controller board by lifting it up from the controller port.

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Step 13 GD-ROM

Sega Dreamcast Logic Board Replacement, GD-ROM: step 13, image 1 of 2

Sega Dreamcast Logic Board Replacement, GD-ROM: step 13, image 2 of 2

Detach the orange cable by giving it a gentle pull while wiggling the cable back and forth until it loosens from the logic board.

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Step 14

Detach the cables by gently pulling the three GD-ROM cables to remove them from the logic board.

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Step 15

Remove the two black 12mm Philips #02 screws located on the left side of the GD-ROM bracket.
The console is rotated 90 degrees counter-clockwise in the first photo. The second photo depicts the normal position.

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Step 16

When lifting the GD-ROM, be careful that the top half of the casing does not detached from its base.
Remove the GD-ROM by gently lifting it from its base.

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Step 17 Fan

Sega Dreamcast Logic Board Replacement, Fan: step 17, image 1 of 1

Remove the white fan header by gently pulling it away from from the controller port.
The white fan header may already be detached if you have completed the Controller Port Disassembly Guide.

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Step 18

Remove the two 8.5mm Philips #00 screws from the fan bracket.

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Step 19

Remove the two 17.5mm Philips #00 screws from the fan bracket.
Remove the fan from the bracket.

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Step 20 Logic Board

Sega Dreamcast Logic Board Replacement, Logic Board: step 20, image 1 of 3

Sega Dreamcast Logic Board Replacement, Logic Board: step 20, image 2 of 3

Sega Dreamcast Logic Board Replacement, Logic Board: step 20, image 3 of 3

Remove the five 10mm Philips #02 screws from left side of the logic board cover.
Remove the three black 12mm Philips #02 screws from the right side of the logic board cover.

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Step 21

Sega Dreamcast Logic Board Replacement: step 21, image 3 of 3

Lift the metal cover from the console.

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Step 22

Before handing the logic board, you may want to use a grounding strap to protect the device from static charge. If you do not have a grounding strip, you may ground yourself by touching a large metallic object.
Remove the logic board and set the logic board on an anti-static surface.