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PSU Problems...computer won't start

post #1 of 6
Thread Starter 
Hey:

Some months ago my PC stopped working. It was rebooting all the time without reaching the initial BIOS screen...I opened the PC case and noticed that the CPU fan was whirling but the PSU fan was jolting away, never starting up.... After much help from the MaximumPC forums, I decided to buy a new PSU.

Here is the PSU I bought:

http://www.newegg.com/Product/Prod [...] 6817171007

I took out the old PSU, inserted the new one on my case and made all connections including the 20pin connector one. A green light on my mobo turned on when I flipped the switch on the PSU, so current was flowing. Yet when I hit the power button on the front of the PC, nothing happened. I opened the case again and noticed that the CPU fan didn't turn on...

Then, I plugged in my old PSU again, just the 20pin connector and noticed the CPU fan started whirling right away without needing to even turn on the PC on the front....

Two things, I didn't connect the 4pin connector (no input on my Asus A7N8X) on the new PSU and I noticed that one of the holes on the 20pin connector has no cable in it (the 18th hole or pin to be exact)...could this mean anything?

Why is the old PSU making the CPU fan whirl and the new PSU can't even make that happen when doing exactly the same connections?

Let me know....

Update:

I took both PSUs and used a paper clip on the green and black wires of the 20pin connector....

My old PSU had 2 fans, one small and one big. I didnt notice that when I used the paper clip, the small one did indeed start....

I used the paper clip on the new PSU and it started as well...

The only difference is that the old PSU made the CPU fan and a front light of the PC case to light up, while the new PSU does nothing but start up a green light inside the MOBO...

Another piece of info...the old PSU makes the green light inside on the MOBO to blink alot

The new PSU doesn't let that happen, instead the green light is just ON without blinking...

Now I am really stuck...


Please help me out! Thanks a bunch
post #2 of 6
Please fix your PSU link and then we can help you more
    
CPUMotherboardGraphicsRAM
AMD FX-6300 3.8Ghz 6-Core Asrock 990fx Extreme3 eVGA GeForce GTX650 1GB 1x8GB Corsair Vengeance 
Hard DriveCoolingOS
1TB WD Green STOCK lol Windows 8 64-bit 
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CPUMotherboardGraphicsRAM
AMD FX-6300 3.8Ghz 6-Core Asrock 990fx Extreme3 eVGA GeForce GTX650 1GB 1x8GB Corsair Vengeance 
Hard DriveCoolingOS
1TB WD Green STOCK lol Windows 8 64-bit 
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post #3 of 6
why is that psu missing a cable
    
CPUMotherboardGraphicsRAM
Intel Core i7 5820k @4.5GHZ Asus Rampage V Extreme  EVGA 980ti classified 64GB Corsair Vengeance 3200MHZ 
Hard DriveOptical DriveCoolingOS
[Samsung 950 Pro 512GB][2X Samsung 840 250GB Ra... 16X LITESCRIDE DVD-RW EK Double Res, Double Pump, GPU, CPU combo Windows 10 x64 
MonitorKeyboardPowerCase
55IN 4K  Ducky Shine Corsair RM 1000i Modular STH10 
Mouse
Corsair m95 
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CPUMotherboardGraphicsRAM
Intel Core i7 5820k @4.5GHZ Asus Rampage V Extreme  EVGA 980ti classified 64GB Corsair Vengeance 3200MHZ 
Hard DriveOptical DriveCoolingOS
[Samsung 950 Pro 512GB][2X Samsung 840 250GB Ra... 16X LITESCRIDE DVD-RW EK Double Res, Double Pump, GPU, CPU combo Windows 10 x64 
MonitorKeyboardPowerCase
55IN 4K  Ducky Shine Corsair RM 1000i Modular STH10 
Mouse
Corsair m95 
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post #4 of 6
Thread Starter 
I read that the PSU 18thpin cable is optional for most 20pin so I don't think thats a problem...

As for the new PSU link:

http://www.newegg.com/Product/Produc...82E16817171007
post #5 of 6
do u have a spear processor laying around
    
CPUMotherboardGraphicsRAM
Intel Core i7 5820k @4.5GHZ Asus Rampage V Extreme  EVGA 980ti classified 64GB Corsair Vengeance 3200MHZ 
Hard DriveOptical DriveCoolingOS
[Samsung 950 Pro 512GB][2X Samsung 840 250GB Ra... 16X LITESCRIDE DVD-RW EK Double Res, Double Pump, GPU, CPU combo Windows 10 x64 
MonitorKeyboardPowerCase
55IN 4K  Ducky Shine Corsair RM 1000i Modular STH10 
Mouse
Corsair m95 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Core i7 5820k @4.5GHZ Asus Rampage V Extreme  EVGA 980ti classified 64GB Corsair Vengeance 3200MHZ 
Hard DriveOptical DriveCoolingOS
[Samsung 950 Pro 512GB][2X Samsung 840 250GB Ra... 16X LITESCRIDE DVD-RW EK Double Res, Double Pump, GPU, CPU combo Windows 10 x64 
MonitorKeyboardPowerCase
55IN 4K  Ducky Shine Corsair RM 1000i Modular STH10 
Mouse
Corsair m95 
  hide details  
Reply
post #6 of 6
Thread Starter 
Nope....could that be the problem?
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