The culprit 99% of the time is actually coil whine. Leaking capacitors don’t last long so by the time you have already read this article your device would have probably failed, thankfully this is the rarest occurrence of this phenomenon so don’t be too concerned.
You can usually visually spot this simply by looking at the top of the capacitor that’s making the noise – if bulging or you can see a brown fluid then this is a true capacitor squeal.
Essentially it’s where gas is escaping through tiny holes in the capacitor and makes a “whistle” sound. The CauseĬapacitor Squeal is actually the noise heard when a capacitor is about to fail. In a custom PC this would normally be a power supply, graphics card or motherboard. More often than not said inductor/coil or capacitor is not found, but you will probably have a good idea what component has the noisy inductor/coil or capacitor. Once of the best techniques is to grab a straw or funnel and put it to your ear – it will help localise the area your straw/funnel is on blocking out much of the background noise. Now, they are usually hidden under a cover which looks good but also helps contain the noise given off. Capacitors haven’t changed much over the years but inductors have, back in the day the coil in the inductor was clear to see What you are looking for is usually a capacitor or inductor/power coil. You need to look and listen to locate the noise but it’s not always an easy task as the culprit maybe difficult to get to or covered by a cooler. Pretty much any electronic device is subject to it in some way or another but it doesn't necessarily mean that something is about to blow up.Ĭommon sense prevails here. It can often be located towards a specific component such as a power supply or graphics card and the noise often changes volume and pitch especially when a certain task is carried out on a PC such as a high workload. In short it’s a high pitched squeal/whine/hiss/buzz noise emanating from a computer or electronic device. Confusingly the term capacitor squeal takes on more than one description and cause we lift the lid on the entire subject. The phenomenon known as capacitor squeal/coil whine/odd noise coming from my PC has been a subject amongst electronic device owners for many years and is prevalent in the gaming PC industry.
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