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Windows 7: HP desktop wont power on!! Help!


02 Jul 2011   #11

W7 Professional x64
 
 

Yes, and then just turn it on as usual. Unhook both PSU's from power before switching around wires, though.

My System SpecsSystem Spec
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02 Jul 2011   #12

Microsoft Windows 7 Ultimate 64-bit 7600 Multiprocessor Free
 
 

Ok. I will try that when I get home from work today.
My System SpecsSystem Spec
03 Jul 2011   #13

Microsoft Windows 7 Ultimate 64-bit 7600 Multiprocessor Free
 
 

Ok I took apart my Dell and first thing I noticed it that the harness to plug into my harddrive is different. So I can't plug my Dell PSU into my HP hard drive. Seems like the 24pin harness for the mother board is the same though.
Should I take a risk and just buy a new psu?
My System SpecsSystem Spec
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03 Jul 2011   #14

Windows 7 Ultimate N 64-bit
 
 

ur HDD with either be sata or IDE, sounds like IDE, just put power into M/B see if that starts up, HDD isnt needed currently
My System SpecsSystem Spec
03 Jul 2011   #15

Microsoft Windows 7 Ultimate 64-bit 7600 Multiprocessor Free
 
 

Ok i noticed that my old dell only had a 20pin harness. I just pulled a PSU from a newer Dell with a 24pin harness and plugged it into my HP motherboard. The it powers up, all fans are turning nicely. So is it safe to say that my motherboard is ok and i need a new PSU?
My System SpecsSystem Spec
03 Jul 2011   #16

W7 Professional x64
 
 

Did it POST and go into BIOS screen? If so, it's probably your power supply.
My System SpecsSystem Spec
03 Jul 2011   #17

Microsoft Windows 7 Ultimate 64-bit 7600 Multiprocessor Free
 
 

Im not sure since I didnt plug my screen in when testing it. But I will try it later today after work again.
My System SpecsSystem Spec
10 Jul 2011   #18

Microsoft Windows 7 Ultimate 64-bit 7600 Multiprocessor Free
 
 

So i think its my power supply. There is someone selling a new 400W Dynex Power Supply for really cheap and I was wondering if it will fit my HP desktop?

[Edit]
Another question is what kind of harnesses needs to be on it? I know it needs the 24pin harness (or 20pin MB and 4pin CPU harness)
my HP PSU has a total of 4 connectors (the 24pin, two very thin looking connectors i think their called SATA connectors, and a 4pin connector)
My System SpecsSystem Spec
10 Jul 2011   #19

W7 Professional x64
 
 

Because you have the slimline, your PSU choices are VERY limited. Make sure it's the right dimensions, which are listed in the link I gave you to a PSU. I haven't worked with dynex, but from what it looks like, it won't fit. The only way to broaden your power supply choices would be to get a new case.

The one I linked is a 24 pin connector, with a P4 connector, two sata, two molex, a 4 pin and a 3 pin.
My System SpecsSystem Spec
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 HP desktop wont power on!! Help!




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