Desktop computer power Failure Repair Example Tutorial

Found a lot of dust in the mess, and there is a burning smell, according to the intuitive initial judgement is the power supply damage or may be the motherboard burned. For the problem, immediately hit the test, because there is no multimeter on the hand, with the test power of the fast method of good or bad, directly with tweezers short connector board line (most lines) plug above the 4th socket and the 7th socket below, as shown in the following figure.

Power quality test (after power, short circuit Green Line and black)

Repair or power supply to solve computer malfunction

Determine if the problem is in the power supply, quickly replace a new, reinstall after the boot check the motherboard is also burned out. Boot display screen quickly into the operating system, after a simple operation, found that everything is normal, concluded that the motherboard is not a problem, so the shutdown to the customer to dispose of dust, reboot, "Ka ka" immediately significantly smaller, all the problems solved.