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Sega Dreamcast Logic Board Replacement

Device	Sega Dreamcast
Difficulty	Moderate
Time	20 - 45 minutes
Steps	22

This guide is by wkwong on iFixit and is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0. ByteRot mirrors it for non-commercial preservation: formatting changed and photos resized for old browsers; full-size photos and the text are on the FTP in /DOCS/REPAIR. Original guide >>

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

Tools: Anti-Static Wrist Strap; Phillips #00 Screwdriver; Phillips #2 Screwdriver

Step 1

• CAUTION: 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.

Step 2

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

Step 3

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

Step 4

• CAUTION: 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.

Step 5

• CAUTION: 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.

Step 6

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

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.

Step 8

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

Step 9

• CAUTION: 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.

Step 10

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

Step 11

• Disconnect the white fan header from the controller port.

Step 12

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

Step 13

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

Step 14

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

Step 15

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

Step 16

• CAUTION: 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.

Step 17

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

Step 18

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

Step 19

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

Step 20

• 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.

Step 21

• Lift the metal cover from the console.

Step 22

• CAUTION: 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.

Conclusion

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

Credit