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  1. Texas Instruments TI-80 Motherboard and Screen Replacement, Batteries: paso 1, imagen 1 de 1
    • Locate battery cover on the back of the case.

    • Slide battery cover to the right reveal the batteries.

  2. Texas Instruments TI-80 Motherboard and Screen Replacement: paso 2, imagen 1 de 1
    • Remove battery cover.

    • Slide the red lock down.

    • Slide the metal tab to the right of the top battery.

    • Remove the 3-Volt Lithium Coin Cell Battery.

    • Slide the red lock up.

    • Slide the metal tab to the right of the bottom battery.

    • Remove the 3-Volt Lithium Coin Cell Battery.

  3. Texas Instruments TI-80 Motherboard and Screen Replacement, Back Case: paso 3, imagen 1 de 3 Texas Instruments TI-80 Motherboard and Screen Replacement, Back Case: paso 3, imagen 2 de 3 Texas Instruments TI-80 Motherboard and Screen Replacement, Back Case: paso 3, imagen 3 de 3
    • Using a Torx, T-6 star-bit screwdriver, unscrew four 7.38 mm screws from battery housing.

    • Unscrew four 7.15 mm screws from back casing.

    • Using the blue plastic opener tool along the seam of the case, pry off front casing.

    • Start prying from the bottom of the calculator as the casing hooks into the top.

  4. Texas Instruments TI-80 Motherboard and Screen Replacement, Motherboard and Screen: paso 4, imagen 1 de 2 Texas Instruments TI-80 Motherboard and Screen Replacement, Motherboard and Screen: paso 4, imagen 2 de 2
    • Using a Philips PH0 screwdriver, remove the 6 screws. 2 from the top of the Motherboard, 2 from the middle, and 2 from the bottom of the Motherboard.

    • Using a Phillips Ph0 screwdriver, remove 4 screws from the screen mount.

    • Using the blue plastic opening tool, pry the Motherboard up.

    • Using the blue plastic opening tool, pry up the screen from the screen mount.

Conclusión

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

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