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Introduction

When desktop monitors stop working, the cause can be attributed to blown capacitors on a circuit board. Rather than discarding the monitor, it’s often times easier and cheaper to replace the capacitor yourself. The cost of a monitor can range from $50-500, while capacitors are generally under $1. It should be noted that capacitors are electrical components that store a charge, so it’s advised to perform this repair only after the device has been unplugged from any power source for at least 24 hours. As an extra precaution, review the How to Safely Discharge a Capacitor guide before disassembly. A smooth surface and a medium level of force will be required.

  1. Ensure that your monitor has been unplugged from any power source for at least 24 hours. Pinch as shown, and pull towards the body  to remove the cover from the stand. This will require significant force. Remove the four 0.7 mm Phillips #0 screws connecting the stand to the monitor.
    • Ensure that your monitor has been unplugged from any power source for at least 24 hours.

    • Pinch as shown, and pull towards the body to remove the cover from the stand. This will require significant force.

    • Remove the four 0.7 mm Phillips #0 screws connecting the stand to the monitor.

  2. Remove the  four 0.7 mm Phillips #0 screws connecting the back panel to the monitor. Remove the single 0.85 mm Phillips #0 screw from the location shown. Insert the plastic opening tool into the crevice along the side, top, and bottom of the monitor.
    • Remove the four 0.7 mm Phillips #0 screws connecting the back panel to the monitor.

    • Remove the single 0.85 mm Phillips #0 screw from the location shown.

    • Insert the plastic opening tool into the crevice along the side, top, and bottom of the monitor.

    • Pry open the monitor by running the plastic opening tool along the crevice.

    • Lift the back panel off of the monitor as shown.

  3. Remove the two 0.7 mm Phillips #0 screws on the sides of the centerpiece motherboard cover. Remove  by hand the two hexagonal screws securing the digital   visual interface (DVI) input. The DVI is typically a blue/black connector with two built-in screw connections on either side. It is secured by hand tightening the two side screws.
    • Remove the two 0.7 mm Phillips #0 screws on the sides of the centerpiece motherboard cover.

    • Remove by hand the two hexagonal screws securing the digital visual interface (DVI) input.

    • The DVI is typically a blue/black connector with two built-in screw connections on either side. It is secured by hand tightening the two side screws.

    • Push the centerpiece motherboard cover toward the body to remove.

  4. Caution: The circuit board contains capacitors (they look like cylinders) that can shock you if they discharge. Be careful not to touch them as you work. If possible, use a capacitor discharge probe to safely rid the capacitors of dangerous charges. Remove the three 0.7 mm Phillips #0  screws connecting the motherboard to the monitor.
    • Caution: The circuit board contains capacitors (they look like cylinders) that can shock you if they discharge. Be careful not to touch them as you work. If possible, use a capacitor discharge probe to safely rid the capacitors of dangerous charges.

    • Remove the three 0.7 mm Phillips #0 screws connecting the motherboard to the monitor.

    • Remove the four 0.7 mm Phillips #0 screws.

    • Use a spudger or plastic opening tool to disconnect the two red and two blue connectors by placing the tool into the crevice and lifting up the connector.

    • Ensure that your pry tool is ESD-safe.

  5. Using two fingers, disconnect the power input from the housing by pushing towards the body through the opening.
    • Using two fingers, disconnect the power input from the housing by pushing towards the body through the opening.

    • Remove the remaining connections by holding down the motherboard and lifting up the connections.

    • A medium level of force will be required to remove the connections.

  6. Examine the top of each capacitor to check capacitor life. A domed top surface indicates a blown capacitor that needs to be replaced.
    • Examine the top of each capacitor to check capacitor life.

    • A domed top surface indicates a blown capacitor that needs to be replaced.

    • Replace necessary capacitors via soldering the old capacitor out and soldering a new capacitor in.

    • Refer to this soldering guide for Comment souder et dessouder des connexions.

Conclusion

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

Daniel Cook

Membre depuis le 20/02/2019

133 Réputation

1 tutoriel rédigé

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