First build, having problems...

[Tweek]

I've been running a 6 year old HP Pavilion and recently the power supply burnt out and I've had no luck finding a replacment. So I bought another cases with a power supply and transfered all the parts minus the power supply to the new case and hooked everything up. When I hit the power button nothing happened. No beeps, no lights, nothing. I found an earlier post about building the system outside of the case with the motherboard, video card, power and monitor so I tried that and still nothing happened. Any advice would be very much apprieciated.

[Dark Nova]

what happend when the powersupply fried

the powersupply could be dead, or it could be the mobo that is fried or ect...

[yeoamuca]

its odd that nothing is turning on
did you make sure the switch on the back of your new power supply is on
and that its on teh correct voltage
otherwise if you are getting no leds or fans its a good chance that your new psu is bad
either that or not compatible with the old hp system

[MakeYourslf2012]

Does the LED come on on the mobo when power is connected?

You could try testing you RAM, GPU, CPU or mobo in a different computer if one is available.

If not, check around for burn/scorch marks on the mobo. Sniff around for burn smells. Theres a good chance your PSU took the motherboard with it.

[Cricket]

Are you sure you have the front panel header hooked up correctly? You may have the connectors on the wrong pins.

Cricket

[jayb1234]

Could also be that HP may have used a proprietary power supply on that model with nonstandard pin assignments.

[Tweek]

I checked the old hp's case and looked at the wires running from the front where the power button and such were and sure enough i had the wires set on the wrong pins, thank you cricket. I still can't get the HD LED on the front to come on but the HD is spining and the mobo is still good. I got all the major issues worked out now .Thank you all for the advice.

[Tweek]

Ok so everything was working untill now. I was running a old 446 celeron in the computer then my brother was getting rid of his computer to buy a new one and he gave me the old one for parts. All of the parts worked but the computer had no hard drive and no RAM so I took the processor out (it was a 1.3 ghz) and installed it in mine. It started up the first except it made a strange noise so I turned it off and it made another noise that was almost like a slight pop. Now nothing will come on... Please help!

[yeoamuca]

popping usually psu dieing
i would try and see if any burn smells are coming from it

[jayb1234]

Popping noises aren't good. Look over everything closely for any evidence that something fried. One thing to look at would be capacitors.

[MakeYourslf2012]

What processor did you take out and what processor did you put in?

Theres a good chance they weren't capatable

[Tweek]

Both CPUs were Intel the one I took out was a 446 and the one I put in was a 1.3 ghz. Could it have been that my mobo was compatible with the new CPU?

[nicolaus corelius]

446 and 1.3gig use totaly different sockets.
dude, how did u even fit the new cpu in an old mobo

[Cricket]

Originally Posted by Tweek Both CPUs were Intel the one I took out was a 446 and the one I put in was a 1.3 ghz.

"446MHz"? Was it a Celeron? If it was, it's a 466MHz and those were Socket 370. There were no 466MHz PIIIs.

The 1.3MHz processor (PIII or Celeron) would have been a Tualatin and those only work with motherboards that support the Tualatin core. If the motherboard supported a 466MHz Celeron it more than likely won't support a Tualatin processor.

The 466MHz Celeron had a vcore voltage of 2.0v. The Tualatin's used 1.45 vcore voltage. The popping sound you heard might have been the 1.3GHz processor getting fried by the higher vcore voltage.

Cricket