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If the CMOS Sensor within your Zerodate T26 mouse is not working due to damage or debris, follow this guide to remove and replace the part. Follow this step-by-step guide with a plastic opening tool to pry the mouse open, a Phillips screwdriver to remove the plates, and a soldering iron to begin replacing them. New CMOS sensors and red LEDs can be purchased online.

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crwdns2931653:01crwdne2931653:0 Scroll Wheel

Zerodate T26 Scroll Wheel CMOS Sensor Replacement, Scroll Wheel: crwdns2935265:01crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement, Scroll Wheel: crwdns2935265:01crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Remove the top shell of the mouse by using the iFixit opening tool to carefully pry the top shell apart from the bottom plate.

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Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:02crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

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Tweezers

$4.99

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Remove the adhesive pads using precision tweezers or the iFixit opening tool.
Adhesive pads are located on the bottom of the mouse.

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Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:03crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Use a Phillips #00 screwdriver to remove all four 10 mm screws.

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Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Carefully pull the middle shell apart from the bottom plate.
The circuit board should then be visible and attached to the bottom plate.

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Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:05crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:05crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Remove the scroll wheel by pushing it to the right and pulling up.

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crwdns2931653:06crwdne2931653:0 Scroll Wheel CMOS Sensor

Zerodate T26 Scroll Wheel CMOS Sensor Replacement, Scroll Wheel CMOS Sensor: crwdns2935265:06crwdnd2935265:01crwdnd2935265:03crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement, Scroll Wheel CMOS Sensor: crwdns2935265:06crwdnd2935265:02crwdnd2935265:03crwdne2935265:0

Zerodate T26 Scroll Wheel CMOS Sensor Replacement, Scroll Wheel CMOS Sensor: crwdns2935265:06crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

Remove the battery from the mouse as shown, and set it to the side for later.
This should now allow you to gently pull the circuit board up from the bottom of the mouse.
Please be very careful when pulling up the circuit board. Yanking it out could result in further damage to the mouse. Make sure you go slow and steady.

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Zerodate T26 Scroll Wheel CMOS Sensor Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

To replace the CMOS sensor attached to the circuit board, carefully de-solder it from the board, found here.
Please be sure to review safety guidelines and guided steps on soldering before attempting to remove any circuitry. In order to keep yourself safe and your mouse undamaged, please follow the guide found here to learn to properly solder.