Question 551Electricity & Electronics - Assistant Engineer

The correct answer is A) reheat connection with a soldering tool and recheck with an ohmmeter. When troubleshooting an electronic circuit, an unreliable high resistance "cold" solder joint can be located using an ohmmeter. Once the problem has been identified, the proper solution is to reheat the connection using a soldering tool to create a reliable, low-resistance solder joint. This allows the circuit to function properly. The other options are incorrect - option B is wrong as a cold solder joint is not a normal condition, option C of heating the entire circuit is unnecessary, and option D of using a match is an improper heating method that could damage the circuit.