My old PSU was dusty and making a lot of noise so i decided to replace it. So i put the new power supply into my PC and connected everything and away i went. After about an hour there was a blue flash followed by crackling electric noise then the PC went dead. I thought that was it , I've killed my PC. I drove to the shop and they replaced the PSU with a more expensive one as i told them the original one must be faulty. Fearing the worst i put everything back together and everything is working and i can't believe it 
Even better when i now know how it happened. When connecting the ATX Power Connector i only connected the 20 pin connector and didn't attach the 4 pin connector alongside.
Have i been lucky?

Even better when i now know how it happened. When connecting the ATX Power Connector i only connected the 20 pin connector and didn't attach the 4 pin connector alongside.
Have i been lucky?
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