Below you can watch the video from test number five with Huntkey LW-6350HG. The knob on the left side of the load tester that we rotate from time to time is in charge of switching which output we want to see on our oscilloscope for the ripple and noise testing. This has no influence on the test (we are saying this because the explosion occurred right after we rotated the knob, but this was just a coincidence). You will see the explosion after around 2 minutes.

What exploded were the two switching transistors. When the power supply explodes this means that the primary side is under dimensioned. When the secondary side is under dimensioned the power supply dies silently, because when a rectifier burns the short-circuit protection enters immediately in action shutting down the power supply.

As you can see on the video, the explosion wasn’t big as the one we’ve see with V-Power 550 W and the transistors didn’t crack like happened with this other power supply, but they were shorted.