My PC Can't boot after i swap a new Power Supply

[Harish Arya]

So I bought a new psu for my old computer Its corssair SV450 PSU, then i swap my old PSU with the SV450 PSU, and when i tried to turn it on Its doesn't boot, So i tried to swap the SV450 psu with my old psu again and it boot normaly. Is it the SV450 or my pc doesn't support a newer PSU

 

My pc spec

Pentium 4

2gb ddr2 ram

Ati radeon HD 2400 pro

Gigabyte GA - 8I915G - LGE

 

[Dufsao14]

The new PSU you bought may be faulty man! Are you able to take it back to where you bought it and ask them to test it for you?

I'm not really an expert on older hardware but I do believe that the standards for Motherboard power connections have stayed relatively the same for quite some time!

 

[berberries]

i think your new psu is defective, RMA it and get a new one.

[OrionFOTL]

Did you flip the switch on the back?

 

[wojtepanik]

try to run it outside of your case, like on the picture, see if it spins the fan

[Tristerin]

If this is an OEM prebuilt you may need to hook up the new PSU and then pull the CMOS for 30 seconds and then try to power up, its what Id try next.

 

By doesn't boot do you mean NOTHING happens or fans spin up and it doesn't POST?  If fans are spinning up Im guessing your missing the CPU 4 or 8 pin power for the board?

[Harish Arya]

2 hours ago, OrionFOTL said:

Did you flip the switch on the back?

 

Yes i did

[Harish Arya]

2 hours ago, wojtepanik said:

try to run it outside of your case, like on the picture, see if it spins the fan

It spin normaly

[Harish Arya]

1 hour ago, Tristerin said:

If this is an OEM prebuilt you may need to hook up the new PSU and then pull the CMOS for 30 seconds and then try to power up, its what Id try next.

 

By doesn't boot do you mean NOTHING happens or fans spin up and it doesn't POST?  If fans are spinning up Im guessing your missing the CPU 4 or 8 pin power for the board?

The fan spin normaly and i did plug the CPU Power pin

[Tristerin]

What about plugging the new PSU in and removing the CMOS battery for 30 seconds, putting it back in and trying again.  If its connected right and you tried all of that, Id say dead PSU especially if you cant jumper it like the picture above.  (I.E. if you can jumper it and it turns the PSU on, I will ask again if this is an OEM prebuilt Ive read they "gate" replacing parts like the PSU)

[Spotty]

11 hours ago, Tristerin said:

(I.E. if you can jumper it and it turns the PSU on, I will ask again if this is an OEM prebuilt Ive read they "gate" replacing parts like the PSU)

 

The PSU doesn't report any information to the motherboard. There's no hidden DRM in the motherboard preventing you from using unauthorised PSUs. The motherboard doesn't know what PSU you're using. As long as it follows ATX specifications and uses standard connectors it should just work.

There's two main issues you face with replacing PSUs in OEM machines and that is form factor of the case not fitting ATX size power supplies (using TFX or SFX), or the motherboard not having standard 24pin connector and instead having a proprietary connector (can be overcome with an adapter cable).