PSU blew up twice!

jonread87

Prominent
Aug 21, 2017
3
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510
Having some PSU related problems.

About a month ago I went to turn on my 10 year old desktop PC, and it booted up for a split second and then just died. At the same time, I noticed that the lamp in the room turned off, and the circuit breaker for the 2nd floor plugs were tripped. So I went downstairs, flipped the switch back up, and then I thought maybe changing the fuse on the power cord might do the trick. So I did that, but when I turned it back on at the wall the back of the PSU popped gently, and it was still not booting up.
It was a Corsair 500w psu. So I figured it was just dead, and this was the perfect excuse to buy a new PC.

Fast forward to now, and I got my new PC yesterday - with an EVGA 650 supernova PSU. So a pretty decent PSU once again, to hopefully last me another 10 years.

Anyway, PC working absolutely fine, no problems - went to bed last night after using it for a few hours before bed, turned it off and went to sleep. Woke up in the morning and went to turn on my bedside table lamp, and didn't work. Had a strange feeling that something was wrong. Checked in the office room (spare bedroom upstairs) and tried the lamp, which wasn't working, and as a precaution I turned off the new PC at the wall.

went downstairs to circuit breaker and sure enough the 2nd floor plugs were tripped out again. This isn't a regular occurance either, this was til date the 2nd time they had done this, first time being when the PSU blew up the last time.

flipped the switch back up on the circuit breaker and went upstairs, as soon as I turned on the wall plug for the PC, a spark shot out the back of the PSU and there was a loud crackle, and dead....

So I'm really not sure what to do. It would seem that it is the wiring that is faulty in the plug socket or the whole house? I've phoned the housing association and they're sending an electrician over to check the wiring. But I'm not sure what to do in the meantime.

Has anyone had any similar experience to this, or can advice on what to do? I'm going to send the PSU back and get a new one, but now I'm scared to plug it in. Will I be able to plug it in downstairs and be safe? Should I get a surge protector plug?

Any ideas or comments at all, very welcome, just completely stumped as to why this is happpening.
 
Solution


If you are going by simply the outlet tester, it isn't 100%. That simply tells you that the outlet was wired correctly. (but that's a good start) I was referring to the possibility that the service entering the residence may be at fault. Surges, spikes, brownouts, etc. That was why I suspected possibly the incoming power form the outside transformer may be at fault. Or between that and your residence if the housing development has its own power distribution.

Are you UK based, US based, or elsewhere? I see the URL above...

clutchc

Titan
Ambassador
Absolutely get a surge protector to plug in between the wall outlet and the PC. A good one. If you would have had one to begin with, the old PSU would probably still be working. It is unusual to get two faulty PSUs in a row, especially one old one and one new one. I suspect the PSUs are not the problem, but that there is an issue with the electrical service. Possibly outside of your residence. Maybe at the power line transformer. Hopefully, the electrician will find the problem. If he finds the inside wiring to be fine, he may have you contact the public service supplier.
 

jonread87

Prominent
Aug 21, 2017
3
0
510


Thank you for your reply - where we live in a new property, the house is still in defect period for 2 years, so I have phoned the Housing Association and they are going to get someone to call me, in the meantime I have bought a master socket surge protected 4 gang extension block and a socket tester from Amazon which should be delivered today. So hopefully that's a start. I'll pick up the new PSU later on, and hook the system up on the first floor of the house instead of 2nd, as they'll be on different circuits.
 

jonread87

Prominent
Aug 21, 2017
3
0
510
Plug tested as being correct, no polarity issues or earth fault etc. So I'm guessing this is just a colossal coincidence and I've somehow ended up replacing a dead psu with a faulty psu....? :S so confuse.
 

clutchc

Titan
Ambassador


If you are going by simply the outlet tester, it isn't 100%. That simply tells you that the outlet was wired correctly. (but that's a good start) I was referring to the possibility that the service entering the residence may be at fault. Surges, spikes, brownouts, etc. That was why I suspected possibly the incoming power form the outside transformer may be at fault. Or between that and your residence if the housing development has its own power distribution.

Are you UK based, US based, or elsewhere? I see the URL above for me is UK.
 
Solution