I'm not gonna count those that exploded in my workshop...
Only the ones that died in regular household use.
1) Anyone remembers Dynex? For non-americans: it's an equivalent of FSP Qdion...
Back then I was overseas and needed any PC ASAP, so I went and bought a cheapest prebuilt at Bestbuy. 2 months later a PSU exploded. Did an RMA and they've replaced it with another Dynex, and it also exploded with sparkly fireworks and lots of magic smoke. Gave up on RMA and bought a good-ole Antec (back then it was still good).
2) Coolmax CUG-950B , which is a shitty PSU per-se, but it served me well for over 12 years. I bought it for my very first HEDT rig(Nehalem and a pair of GTX275's in SLI!!!). This one died quite recently, and quietly. Wanted to throw it into my cheap-ass HP Z620 ghetto-rig, but it simply refused to power up. It's just a failed standby rail, so I might fix it some time in the future(along with missing modular cables).
3) My trusty Seasonic SSR-450RT. Same thing as coolmax - standby rail started acting up, especially after power loss or hitting the back switch. Eventually it stopped working all together.
BTW, I've managed to fix it about a week ago, all while playing a Russian Roulette with infamous new Gigabyte PSUs.... It was so cheap that I simply could not resist
(I mean it was even cheaper than no-name and bottom-of-the-barrel garbage). I guess news have caught-up with retailers and they are dumping them at loss(or at cost, depending on how you look at it
).
4) Do laptop power bricks count?