{"id":4298,"date":"2021-09-21T20:26:30","date_gmt":"2021-09-21T19:26:30","guid":{"rendered":"https:\/\/www.andrewhope.co.uk\/Blog\/?p=4298"},"modified":"2021-09-21T20:26:30","modified_gmt":"2021-09-21T19:26:30","slug":"computer-psu-failure","status":"publish","type":"post","link":"https:\/\/www.andrewhope.co.uk\/Blog\/computer-psu-failure\/","title":{"rendered":"Computer PSU failure"},"content":{"rendered":"<p>A weird one tonight that&#8217;s left be frustrated, confused and annoyed all at the same time.<\/p>\n<p>I hooked up a spare computer and power supply, booting up an Ubuntu linux distribution so that I could scan through some old hard drives.<\/p>\n<p>Graphics were all wonky and affected (bad artificats). I decided to shut down the computer as I thought it was simply a case of a poor motherboard that was old. I was going to swap it with a spare I had.<\/p>\n<p>In between getting the spare ready, next thing I hear is what sounded like a baloon deflating.<\/p>\n<p>The hell was that?<\/p>\n<p>Next thing I know, I see loads of smoke piling out of the power supply. That&#8217;s not good<\/p>\n<p>It also managed to trip my 32A breaker for the ring main, so a severe short or overload somewhere.<\/p>\n<p>Great&#8230; just great. Good thing I have a spare power supply<\/p>\n<p>Oh well, I have a spare power supply, so I hooked it up and tested with this motherboard, as I suspected it was a bad PSU<\/p>\n<p>Nope, same problem with graphics. Ah well, guess it is a dodgy board then<\/p>\n<p>I go about hooking up my spare motherboard, then FFFFFFFFFFFFFFFFFFFFF smoke again<\/p>\n<p>Damn it!! Not again.<\/p>\n<p>Now, I could have stripped these down and resoldered a new Cap onto them, but I ain&#8217;t risking it.<\/p>\n<p>Not sure what happened, basically best I can work out<\/p>\n<p>&#8211;&gt; Shorted motherboard, damaged PSU<\/p>\n<p>&#8211;&gt; Bad earth fault in wiring \/ extension \/ house<\/p>\n<p>&#8211;&gt; Bad cable<\/p>\n<p>&nbsp;<\/p>\n<p>I suspected the cable, so went about doing some diagnosis.<\/p>\n<p>Tested the fuse with a multimeter, continuity.<\/p>\n<p>Checked the cables, continuinty with only the wires for each oen<\/p>\n<p>Tested the voltages when plugged in (Earth-Live = 240v, Live-Neutral = 240v, Neutral-Earth = 0V). No leakage here.<\/p>\n<p>I even hooked up my test plug, all correct.<\/p>\n<p>&nbsp;<\/p>\n<p>So now I&#8217;m stumped, the cables good. Motherboard is the only potential thing I can thing of causing the issue. I used the same cablehowever when hooking up the 2nd motherboard which was out of the cas.<\/p>\n<p>So now I&#8217;m thinking it&#8217;s a bad cable, or something else in my house has gone funny.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A weird one tonight that&#8217;s left be frustrated, confused and annoyed all at the same time. 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