You could try swapping the power twine or take a look at the continuity to grasp If your twine is Doing work well. Take out almost any surge suppressor or UPS and join the power wire on to the wall outlet. Examine the capacitors, if any of these are bulging https://powersuppliesrefurbishmen99999.blazingblog.com/30192781/the-single-best-strategy-to-use-for-power-supplies-refurbishment