Introduction
When a Dreamcast ask for time and date every time you power on your system, your CMOS battery is dead. This guide shows how to replace the CMOS battery.
What you need
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Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.
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Turn the console right side up.
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Remove the top cover by gently lifting the upper portion of the console.
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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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Note where the positive and negative terminals go.
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Desolder the old CMOS battery from the controller board.
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Solder the replacement battery holder to two electrical wires.
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Solder the opposite ends of the wires to the controller board. Make sure to match corresponding points on the board with where the previous positive and negative terminals were.
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Reinsert the controller board.
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Attach the battery holder inside with a self adhesive substance, such as double sided foam tape.
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Insert the battery into the battery holder.
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Reverse the disassembly directions to reassemble your Dreamcast.
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Once your Dreamcast is reassembled, go ahead and connect the Dreamcast to your TV or monitor and power, and reset the clock.
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