What are the most common misconceptions about computer hardware troubleshooting tools?

1 Misconception 1: Blowing on connectors

You may have seen or done this yourself: blowing on a connector or a slot before inserting a cable or a card. The idea is that this will remove any dust or debris that could interfere with the connection. However, this is not only ineffective, but also potentially damaging. Blowing on connectors can introduce moisture, saliva, or even particles from your mouth that can corrode or short-circuit the contacts. Instead of blowing, use a can of compressed air or a soft brush to gently clean the connectors.

2 Misconception 2: Using a magnet to erase data

Some people may think that using a magnet to erase data from a hard drive or a flash drive is a quick and easy way to dispose of sensitive information. However, this is not true for several reasons. First, modern hard drives and flash drives are shielded from magnetic fields and require very strong magnets to affect them. Second, even if you manage to erase some data, you may not erase all of it, and some fragments may still be recoverable with special software. Third, using a magnet can also damage the physical components of the drive, making it unusable. Instead of using a magnet, use a software tool that can securely wipe the data by overwriting it multiple times.

3 Misconception 3: Using a screwdriver to test power supply

Another common misconception is that using a screwdriver to short-circuit the pins of a power supply unit (PSU) is a safe and reliable way to test if it works. However, this is very risky and can result in electric shock, fire, or damage to the PSU or other components. A screwdriver is not designed to handle the high voltage and current that a PSU delivers, and can create sparks, arcs, or shorts that can harm you or your equipment. Instead of using a screwdriver, use a multimeter or a dedicated PSU tester that can measure the voltage and current of each output.

5 Misconception 5: Using a hair dryer to dry wet components

Accidents happen, and sometimes you may spill liquid on your computer or its components. A common reaction is to use a hair dryer to dry them as quickly as possible. However, this is not a good idea, as it can cause more damage than the liquid itself. A hair dryer can generate heat, static, or airflow that can warp, crack, or short-circuit the components. It can also blow the liquid deeper into the crevices or circuits, making it harder to remove. Instead of using a hair dryer, turn off the power, disconnect the battery, and remove the affected components. Then, use a soft cloth or a paper towel to blot the excess liquid, and let them air dry for at least 24 hours.

7 Here’s what else to consider

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