When your computer monitor cable is damaged from constant twisting or a power surge, you can make repairs to it with a few basic electronics tools and supplies and place the monitor back into service in minutes. Avoid waiting days for a new cable to arrive. Repair the cable instead of replacing the monitor to save money and time.
- Skill level:
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Things you need
- Wire cutters
- Wire strippers
- Helping hands soldering aid
- HDD 15-pin male D-sub solder type connector
- Electronic soldering iron with stand
- 60/40 tin/lead solder
- D-sub hood
Remove the power cable from the back of the monitor and allow it to sit for at least an hour to discharge any residual power that may be present. Disconnect the monitor cable from the computer.
Cut the monitor cable just before the damaged portion of the cable, or 2 inches from the connector if the connector is damaged and the rest of the cable is intact.
Strip about 1 inch of outer insulation from the end of the cable that is still attached to the monitor. Strip the same amount from the end of the cable that has been cut off to expose the inner conductors.
Strip about one-quarter inch of the insulation from each of the inner conductors of both cable sections.
Set up the helping hands soldering aid and clamp an HDD 15-pin male D-sub solder type connector into the device so that the solder ends are exposed and easily accessible and somewhat level.
Set the multimeter to the continuity / Ohm setting and connect the leads to the proper ports on the meter. Press one lead from the meter to the centre pin on the old connector and probe the wires until the one that is connected to the pin is found, as indicated by the meter reading. The reading will be the same as if the two leads on the meter were touched together.
Preheat the soldering iron for two minutes, being careful not to burn any surfaces that are near.
Place the conductor with the same colour wiring as that discovered with the meter for the centre pin into the centre pin solder socket on the new connector. Touch the soldering iron to the conductor where it meets the socket for two seconds and then apply the tip of the 60/40 tin/lead solder to the conductor while holding the iron in place until solder runs down the conductor and fills the socket just to capacity. Remove the soldering iron and solder and allow this junction to cool for 30 seconds.
Repeat this procedure for each pin on the connector, soldering the exact same colour wire into each pin on the new connector, working from the centre of the connector outward.
Inspect carefully for solder bridges between pins or for poor connections and reapply solder as necessary. When finished, attach the D-sub hood to the connector. Connect the monitor to a computer and to a power source and test it by turning on the computer and the monitor. Allow the monitor to operate for at least an hour with constant supervision to ensure proper wiring and reduce the risk of smoke or fire damage.
Tips and warnings
- When first testing a monitor that has been repaired always attach it without screwing in the connectors and leave the monitor out in an exposed place where it is easy to grab and disconnect from the computer and the power source. If a small puff of smoke or hot smell starts coming out of the monitor it is sometimes possible to quickly unplug it and bring it outside until it cools off or stops smoking, avoiding noxious fumes and possibly averting a fire.
- Solder fumes can be dangerous if inhaled, so always work in a well-ventilated environment. Soldering irons and soldered connections are extremely hot and can cause burns or fires. Excess solder can cause bridging between pins on the connector, which can cause a short circuit and destroy the monitor.
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