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This can be accomplished using an oscilloscope or multimeter dependent on the complexity of the circuit board.<br><br>Circuit boards that have been damaged are usually caused by defective components. They could be things such as a defective diode, or transistor. In some cases the issue could be caused by an unrepaired trace path. Traces are comprised of silver or copper and are susceptible to being damaged by physical damage, extreme power surges, metallic dust contamination, and normal wear and tear.<br><br>Before you attempt to repair a circuit board it is essential to make sure that you have the necessary tools and materials. This will help ensure that the repair is as easy as it can be. It is recommended to have soldering tools such as sandpaper, sandpaper, and a desoldering device at your side. You should also protect yourself from electrostatic discharges which can cause damage to circuit boards. 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