pc build from scratch not working need help!

hi - i recently built a rig heres the spects

500watt psu

core2duo

p5n - sli asus mobo

2gigs - cheap brand ram

exelstor-160gb hdd sata2

3870 saphire radeon

dvd burner

ive connected everything correctly and 500 watts is definetly enough power for my system and an led on my mobo shows it has power but when i press the power button the l.e.d.s flicker and thats it. no fans turn on, nothin except my case leds whats wrong? also there is no beeping so its not ram or video card. - i tested all my components iduvidualy except cpu(which probly works) but i cant find the prob please help!

Sounds like a possible short. To check for this set the motherboard up outside of the case, like on the box or a phone book.

I would check for simpler things first. Try it with the bare minimum, 1 stick of RAM, the CPU, and GPU, see if it boots to BIOS.

I would also check the PSU. You can "hot-wire" it to see if it will power a fan while not hooked up to the mobo. What kind of PSU is it, 500w does not mean much.

i got a psu for 20 bucks - its an ultra x connect modular psu. cmos are normal. does the cpu have to be under a heat sink for it to work - i was just trying to get it to turn on

i got a psu for 20 bucks - its an ultra x connect modular psu. cmos are normal. does the cpu have to be under a heat sink for it to work - i was just trying to get it to turn on

TFL_DARKEXILE

i got a psu for 20 bucks - its an ultra x connect modular psu. cmos are normal. does the cpu have to be under a heat sink for it to work - i was just trying to get it to turn on

TFL_DARKEXILE

Yes you need a heatsink, modern CPU's can burn up in seconds. Do you not have one? Some motherboards will not start up with out a CPU fan hooked up

is there an easier way to test it rather than hotwireing? - i did test with bare minTFL_DARKEXILE

It is quite easy to hot wire it, other than putting it in another PC there is not much you can do.

is there an easier way to test it rather than hotwireing? - i did test with bare minTFL_DARKEXILE

$20 for a psu.... yeah seems to me like that power supply is no good, if everything else works

kk so ill put it under a heat sink- will it bunout just from powering it up?

Try clearing the CMOS of the motherboard. This solved a similar problem I had a similar problem when I built my first computer.

@ch5richards: Thanks for that link, man. I had been wondering how to do that for a while now. =)

kk so ill put it under a heat sink- will it bunout just from powering it up?

TFL_DARKEXILE

It is possible to have burnout your cpu from powering it up without a heatsink in the first place, since it was your first build you need to be more careful

i connected my psu to another computer it wouldnt power up - i used another psu on my pc and it wouldnt power up is this a mobo prob?

i connected my psu to another computer it wouldnt power up - i used another psu on my pc and it wouldnt power up is this a mobo prob?

TFL_DARKEXILE

Like I mentioned above, try clearing your CMOS. Also, you need to plug the power for the heatsink's fan into the motherboard. If you didn't, that's probably your problem.

i connected my psu to another computer it wouldnt power up - i used another psu on my pc and it wouldnt power up is this a mobo prob?

TFL_DARKEXILE

1. What is the brand Power supply you used (the new one you just used)

2. Wattage?

Obviously it was the psu in the first place, if you just connected a psu you had laying around could result to same issue without a proper powersupply it wont work

no i mean if i powered up withoout a heatsink will it burn out in that short second - it wont power up all the way thts y i askTFL_DARKEXILE

Do you not read my replies? Yes it is possible

no i mean if i powered up withoout a heatsink will it burn out in that short second - it wont power up all the way thts y i askTFL_DARKEXILE

No it won't, it won't even start with many motherboards. You need to put the heatsink on the CPU and plug the fan in.

no i mean if i powered up withoout a heatsink will it burn out in that short second - it wont power up all the way thts y i askTFL_DARKEXILE

Yes it can, it is necessary to have a heatsink, make sure you also apply a substance called thermal paste before placing the heatsink on top of the processor.

[QUOTE="TFL_DARKEXILE"]

i got a psu for 20 bucks - its an ultra x connect modular psu. cmos are normal. does the cpu have to be under a heat sink for it to work - i was just trying to get it to turn on

skulper34

a bit harsh but true....

this deserves a...

/facepalm

/sigh

both while shaking your head in wonderment :p

P.S. If you are not sure what you are doing find someone who does, or get on your buddies comp and find a how-to guide on the internet. You could cost yourself quite a bit of cash if you had wound up frying your CPU :/

I can't figure out why my engine died. Could it be because I didn't put any oil in it? ... :roll:luamhtrad

what is that supposed to mean just help me with english is there a chance that my mobo still might work if my cpu burntout in it?

It seems someone didn't do much reseach before they made the investment..

http://www.pcmech.com/byopc/

Fallow that guide.. all the way to the bottom.. then ask for help if everything does not work.

Did you take the black socket protector of where the CPU goesrisc-vs-cisc

come on.... lol no one is that stupid

Um, ok....no heatsink, put the heatsink on!!!! :D

Also, you won't hear the post(1 beep) or any other beeps without hooking up some speakers first. It's strange that you said there were NO beeps so this leads me to speculate that you didn't have any speaker plugged in.

[QUOTE="risc-vs-cisc"]Did you take the black socket protector of where the CPU goescom2006

come on.... lol no one is that stupid

Um, ok....no heatsink, put the heatsink on!!!! :D

Also, you won't hear the post(1 beep) or any other beeps without hooking up some speakers first. It's strange that you said there were NO beeps so this leads me to speculate that you didn't have any speaker plugged in.

VoodooGamer

Actually, most motherboards have an onboard speaker for POST notification alarms. Older systems relied on the system speaker (part of the case and connected directly to the mobo) for this purpose. No sound will come out of the external speakers until the OS has booted.