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Won't power up?

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#1 itzethawn


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Posted 23 March 2013 - 05:02 PM

I started recently getting BSOD's on Battlefield 3. I got two, then I got one on DayZ. I did memtest and ran a chkdisk and nothing was wrong. So I figured it was my poor cable management that was making everything get way too overheated. I routed the psu cables through and made them neat and allowed the cpu to get much more air. But as I was turning it on after replugging everything, the display wouldn't show. I got no display from the monitor, and the power button on  the front didn't have a white LED. I thought I just plugged something in wrong so I replugged in the cords and took out ram and reseated it (this has fixed no display problems for me before) and still wasn't working. I replugged everything in AGAIN and then I got nothing at all. Before I still got all the components running, cpu heatsink, case fans, gpu fan, and psu fan. I could hear everything in my computer running, but now nothing would turn on at all. I don't know what I did wrong, and I'm really hoping this isn't faulty hardware because it was JUST working an hour ago.


My specs are :
Corsair CX500

Nvidia GTX 660

AMD Phenom x4 965 black edition

16gb ddr3 ATA Gaming ram

CM1630 Asus Mobo

1tb Seagate 7200rpm HDD


Please give me ALL the possible options I have because I really need to try everything before I replace any parts as I'm really short on money at the moment and I also use this for online schooling.

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#2 dc3


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Posted 24 March 2013 - 10:30 AM

If no fans spin up, there are no LEDs, then it sounds like the PSU isn't activating.


When you press the power button it shorts the two header pins on the motherboard where the power button lead are attached.  This is what initiates the PSU.


To find out if the PSU is working use the instructions below.


The purpose of this procedure is to bypass the motherboard to test the PSU.

When a computer begins the boot process the motherboard initiates the start up of the PSU. Because of this it is difficult to determine whether the problem is with the motherboard or the PSU when a computer shows no signs of starting up. The purpose of the procedure is to determine if the problem is with the motherboard or the PSU.  For safety purposes please follow the instructions step by step.

This test is for ATX PSUs. Some manufacturers use non-ATX PSUs with 20/24 pin connectors that do not have the same pinout as a ATX PSU.

First, shutdown your computer. Then unplug the power cable going into your computer.

Once you have opened the case, touch the metal of the case to discharge any static electricity.  

The connector of the PSU which connects to the motherboard is readily recognizable by the number of wires in the bundle.  To disconnect it you will need to press on the plastic clip to disengage it and then pull the connector up and away from the motherboard.  Please take notice of the location of the locking tab and the notch on the socket of the motherboard, this will only connect one way as it is keyed.  This wire bundle will have a memory of the way it has been installed and will want to bend back that direction, you may have to play around with it to find a position that the connector will stay in the same position while you run the test.


From the top left to right the pins are 13-24, the bottom from left to right are 1-12.

Please notice that there are PSUs with 24 pin and 20 pin connectors, the location of the green wire in the 24 pin connector is #16, and the green wire in the 20 pin connector is #14.  If you look at the connector with socket side facing you and the clip on the top the number one pin will be on the bottom left corner.  This makes the pin out for the 24 pin connector from left to right 13-24 on top, and 1-12 on the bottom.  The pin out for the 20 pin connector from left to right is 11-20 on top , and 1-10 on the bottom. If you look at the connectors you notice that these are sockets that fit over the pins on the motherboard where the PSU cable attaches, this is where you will place the jumper.  For a jumper you will need a piece of solid wire about the size of a paper clip (20-22 awg), preferably a wire with insulation.  It will need to be large enough to fit firmly into the socket so that it will not need to be held in place while testing.  You are at risk of electrical shock if you are holding the jumper when you power up the PSU.  Insert one end of the jumper into the socket of the Green wire, and insert the other end into the socket of any Black wire.

Once the jumper is in place plug the cord back in. If the PSU is working properly the case fans, optical drives, hdds, and LEDs should power up and remain on.  I would suggest that you not  leave this connected any longer than is necessary for safety purposes.

To reconnect the 20/4 pin connector unplug the power cord, remove the jumper, and reconnect the connector. Take a moment at this time to make sure that nothing has been dislodged inside the case.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.





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