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Use a 2.5 mm Allen wrench to loosen the three screws securing the front cover of the printer base.
Use a 2.0 mm Allen wrench to loosen the three screws on the left side of the front cover of the printer base.
Use a 2.0 mm Allen wrench to loosen the three screws on the right side of the front cover of the printer base.
Use a 2.0 mm Allen wrench to loosen the three screws located under the front cover of the printer base. Use a 2.5 mm Allen wrench to partially loosen the two screws on the left and right sides of the middle plate by approximately half a turn. Remove the middle plate and place it flat on a clean work surface.
Remove the adhesive tape securing the cable on the side of the touchscreen. Lift the locking cover of the touchscreen cable connector, disconnect the touchscreen cable, and use a 2.0 mm Allen wrench to loosen the four screws fixing the touchscreen.
Remove the old touchscreen.
Remove the new touchscreen from its packaging and peel off the protective film.
Position the new touchscreen in its original location, align the mounting screw holes, and use a 2.0 mm Allen wrench to tighten the four fixing screws.
Note: The silkscreen on the back of the touchscreen must face upward and align with the side of the metal threaded hole to prevent incorrect upside-down installation.
Reconnect the touchscreen cable to the connector, close the locking cover, and reattach the adhesive tape.
Reinstall the front panel. Use a 2.5 mm Allen wrench to tighten the fixing screws on the left and right sides of the middle plate.
Use a 2.0 mm Allen wrench to tighten the three fixing screws on the left panel and the three fixing screws on the right panel.
Use a 2.0 mm Allen wrench to tighten the three screws on the base plate.
Power on the printer and test the touchscreen buttons. If the touchscreen responds normally, the replacement is complete.