My guess is that the PSU may be the problem, not the charger. It seems possible that the PSU may have a fault that's making the low voltage output terminals float at around the supply voltage, which is potentially pretty dangerous. To check, put a meter between your household supply ground and the PSU output, with the meter switched to a suitable AC range for your countries supply. You shouldn't see any voltage at all during this test, if you do then it shows a lack of isolation in the PSU that needs to be fixed.
Please ask questions on the forum, rather than by PM, as it helps others and you'll get a better range of answers.