In article , "Regal"
says...
I read on some website that the capacitors in a PC's PSU can hold a
charge for long after they have been switched off and that the
charge could be fatal.

Is this really so? Surely that is exaggerating?

Yes it is so, no it's not exaggerating. Having said that, I'm still
here so you probably won't kill yourself if you're reasonably careful
and vaguely clueful.