yes the ps is switched on and it is the abit nf7-s 2.0, and when i switch the ps onn the fan does start spinnning for a second but i am getting no power to the motherboard
empty said yes the ps is switched on and it is the abit nf7-s 2.0, and when i switch the ps onn the fan does start spinnning for a second but i am getting no power to the motherboard
That almost makes me think the board is shutting down due to the cpu overheating. Does that board have "auto cpu shut down" ?
empty said yes the ps is switched on and it is the abit nf7-s 2.0, and when i switch the ps onn the fan does start spinnning for a second but i am getting no power to the motherboard
That almost makes me think the board is shutting down due to the cpu overheating. Does that board have "auto cpu shut down" ?
i havent een got it turned on so i dont think that is it
You have video card and other components well seated?
I mentioned the cpu because on my first build, I didn't have the cpu locked in all the way and it kept shutting right back off. The cpu overheat protection was on by default. (good thing too)
Hmm... the PSU might not be providing enough power to run everything. 350W is kind of weak for the higher clocked Athlons. What does it say on the PSU for how many watts each voltage puts out for 12V and 5V especially...
Did you use the standoffs on the bottom of the Motherboard? You know the things that go between the mobo and the case to stop it from shorting out. It will only turn on for a sec before immediately turning itself off again if it is shorting out......
yes i did, the motherboard isnt even turning on though just the fan moves when i turn on the psu
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Straight_ManGeeky, in my own wayNaples, FLIcrontian
edited September 2003
Ok, the following SHOULD happen-- FANS go on and stay on, including one in PSU. IF PSU fan never goes on then PSU is dead or you have a ground short in case or motherboard mounting or somehting shorting it, a DEAD on ARRIVAL CMOS cell, CMOS cell that was shipped in reset mode and needs to be flushed as it was grounded duirng mounting while enabled, or RAM that is not at all good in first module of first in line DIMM.
With NO video card in you should get beeps and fan shuold stay on-- if you plugged in the case speaker and reset and power-good circuits onto motherboard.
Reversing USB connections can ground short such that you get a no-boot and no-beep also, unplug USB wires and audio and LED connectors. Go to raw basics. If you get a system BIOS panic of continuous tones or alternating high-low tones and box stays on for over 30 seconds you have a basic good power circuit unless PSU is damaged and not dead. I have seen about 3% of the time a reship of an RMA'd and damaged PSU in a different case by many folks.
Ground shorting CMOS cell for 10-15 minutes will drain it beyond use at first poweron and not using studs of right height will cause ground shorts if they are too short--anything under motherboard that conducts can cause a ground short unless it is a correctly positioned vertical to mohterboard plane stud when the case is motherboard mount plane DOWN. I tried to give you order I would check things myself as a triage tree in text form.
I've had the same problem. My board was shorting out, try taking out the motherboard and set it on the mobo box or something non-conductive, then hook the cpu, psu, memory, and video card and see if it works.
I can list a few things I have run into that caused mine not to power up.
1) the cpu thing I already posted
2) connected front panel wiring wrong ( the manual was wrong and I had to go to the website and get the correct diagram)
3) not clearing the CMOS after connecting wiring wrong
An amigo of mine had a similar problem... RMA'd the mobo and the next one had the same problem. Sent it back for refund and bought an Asus... problem solved!
...then I think you have a CPU fan not spinning detection glitch. I had this same exact problem with one of my old T-Bird boards. The bios had no delay to allow the CPU fan time to spin up. As soon as the power was turned on the board would immediately sense that the CPU fan wasn't spinning fast enough and turn everything right back off.
I finally got around it by repeatedly pressing the power button - eventually it would start and stay started. (This is risky, I wouldn't necessarily recommend doing it that way).Then I found an updated bios with a delay built into the fan speed detection. The bios would wait a few seconds when fan speed dropped too low before nixing the whole works.
If it is a hardware problem you'll basically have to try swapping out components until you find the stinker. I'd start by trying a new power supply.
Good Luck - you've got to save your P's from a Dell!:banghead:
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Geeky1University of the Pacific (Stockton, CA, USA)
edited September 2003
Is the red LED on the motherboard lighting up? If not, it's almost definitely a PS problem.
Comments
and what Mobo are you using?
That almost makes me think the board is shutting down due to the cpu overheating. Does that board have "auto cpu shut down" ?
i havent een got it turned on so i dont think that is it
Oh, and the 12V connector is the one that is "above" the main motherboard power connector, if you think of the AGP slot as "below"
I mentioned the cpu because on my first build, I didn't have the cpu locked in all the way and it kept shutting right back off. The cpu overheat protection was on by default. (good thing too)
to clear cmos then shut power off completely and unplug from the board. Plug power back in and fire it up.
NS
With NO video card in you should get beeps and fan shuold stay on-- if you plugged in the case speaker and reset and power-good circuits onto motherboard.
Reversing USB connections can ground short such that you get a no-boot and no-beep also, unplug USB wires and audio and LED connectors. Go to raw basics. If you get a system BIOS panic of continuous tones or alternating high-low tones and box stays on for over 30 seconds you have a basic good power circuit unless PSU is damaged and not dead. I have seen about 3% of the time a reship of an RMA'd and damaged PSU in a different case by many folks.
Ground shorting CMOS cell for 10-15 minutes will drain it beyond use at first poweron and not using studs of right height will cause ground shorts if they are too short--anything under motherboard that conducts can cause a ground short unless it is a correctly positioned vertical to mohterboard plane stud when the case is motherboard mount plane DOWN. I tried to give you order I would check things myself as a triage tree in text form.
John.
1) the cpu thing I already posted
2) connected front panel wiring wrong ( the manual was wrong and I had to go to the website and get the correct diagram)
3) not clearing the CMOS after connecting wiring wrong
or maybe bad ram stick?
cdrom, floppy, etc?
I finally got around it by repeatedly pressing the power button - eventually it would start and stay started. (This is risky, I wouldn't necessarily recommend doing it that way).Then I found an updated bios with a delay built into the fan speed detection. The bios would wait a few seconds when fan speed dropped too low before nixing the whole works.
If it is a hardware problem you'll basically have to try swapping out components until you find the stinker. I'd start by trying a new power supply.
Good Luck - you've got to save your P's from a Dell!:banghead:
What did you do to get it working? Maybe the info will help someone else in the future.