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Why won’t your computer start?

Your desktop computer is not starting when you turn on the power. The system lights up, but the computer never displays anything on the screen. You’ve checked the voltage coming out of the wall outlet with a multimeter, and it appears to be normal. You also checked the power connector on the motherboard, and found that the 12 volt pin was only showing 6 volts. What is the most likely cause of this issue?

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