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Problem powering up Dell Inspiron 531s when ATX CPU cable is connected

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#1 rentasa


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Posted 21 January 2015 - 04:20 PM

Hello people,

I have a Dell Inspiron 531 s. It would not power up so I cleared the cmos and the light in the back would light up but as soon I hit the power button, it would shut off. I figured it was the PSU. I did the paperclip test and it didn't work. I replaced the PSU with a new one and it still didn't work. I did the paperclip test again to make sure it wasn't another bad PSU and it was working. So I disconnect everything from the motherboard except the power button and it powered up. Yay, progress. I began plugging things one by one and try and then I came to the ATX CPU cable (2 brown and 2 black cables). When I connect that one it would not power up at all. I have determined that to be the problem, however, I'm not sure how to go forward to finish fixing it. Is it the MOBO or CPU that is bad? 


Appreciate all the help,


Alex Rentas

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