From Dave’s Garage.

Dave shows you a RIFA capacitor explosion and then explains what they are, what they’re for, why they fail so spectacularly, and whether or not you should proactively replace them. Free Sample of my Book on the Spectrum: https://amzn.to/3zBinWM

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RIFA explosion credit: Peter Cetinski https://www.youtube.com/channel/UCcMt6yNrSh_iIlTUJLYbrEQ/videos

Power supplies contain mains voltage when connected and their large capacitors can store dangerous charges for long periods; if in doubt, always contact a qualified technician.