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new computer not booting up

Deeko

Deeko

Lifer
Is my power supply DOA? I jus got my new system in, and when I go to power it up, the power starts for a fraction of a second and shuts off. Everything is connected right.
 
Could also be a dead mobo maybe? If you have any PSes handy test your mobo with that before jumping to any decisions.
 
Yummm Toast with butter & strawberry jam......


It seem like you may have a short there somewhere,remove the board only use a video card,ram,cpu,heatsink & see if it powers up outside the case.
 
One neat trick is running the power supply without the mobo attatched. ATX powersupplys stay on as long as they get the "power good" signal from the mobo. Thats how windows can shut em off now, end the power good signal. But you can also duplicate the power good signal, heres how.

Look at the power lead that goes to the mobo, see that theres only one green wire? It leads to the 13th pin on the connector. Grab ya a piece of wire or a paperclip and stick it into that bad boy.

Now stick the other end into any of the black ones.

Now plug in the powersupply. If the fan comes alive the powersupply is prolly good.

Pull out the wire/paperclip. See the powersupply shut down? Neat trick, eh?

 
Power supply works. There is a magnet in it that was sticking to my case, I unstuck it...everything spins up now, but nothing comes up on the screen. Disconnected all the drives, still no go. swapped video cards. still no go. any ideas?
 
first clear the cmos with the jumper or by taking out the battery, there may be a bad setting

if nogo, next swap out whatever parts you can, ram, cpu, video

still nogo? Then take out mobo and powersupply, set up on a wood table or sumthin non conductive with only, cpu ram and video, that way you can be sure nuthing in the case is groundin, including ide cables and such.

still nogo? Then take out ram cpu or videa and see if you get beeps. if you can take out a part and still get no beeps, yer problem is prolly whats still on the mobo. process of elimination should lead you to which is the issue.

if you get beep codes for ram, cpu and video, then set the system on the ground and go drink lots of warm water.
 
A led on a motherboard will usually light up if it is receiving power even when the computer is off. I'm guessing there is a short somewhere so boot your computer completely outside of your case once and see what happens.
 
Just wondering per say that the LED did turn on then what can you conclude about the system because that is the exact problem I am getting.
 
Originally posted by: HypeR0piA
Just wondering per say that the LED did turn on then what can you conclude about the system because that is the exact problem I am getting.
Click to expand...

Most likely bad CPU or board.
 
I think its the RAM. I popped it out, got a beep code. Popped it back in, still get the beep code. The LED indicator of POST operations is at C1, or detecting RAM. Sounds like the RAM to me.
 
I had a problem like this once. I purchased like a thousand dollars worth of parts for a server I was building. I put everything together, pressed the power button and nothing happened. I must've tested each and every part of the system to see if it was the problem but it turned out to be a very simple solution. It turns out that the way that the motherboard was screwed in was shorting out the whole computer. Just make sure that you screwed everything in correctly, and if the board came with a little padded nut-kinda thing, make sure you use them to insulate the screws.
 
Ahhh! A beep code helps a lot what was the pattern of beeps and pauses? Award bios?
 
Originally posted by: Fixxors
One neat trick is running the power supply without the mobo attatched. ATX powersupplys stay on as long as they get the "power good" signal from the mobo. Thats how windows can shut em off now, end the power good signal. But you can also duplicate the power good signal, heres how.

Look at the power lead that goes to the mobo, see that theres only one green wire? It leads to the 13th pin on the connector. Grab ya a piece of wire or a paperclip and stick it into that bad boy.

Now stick the other end into any of the black ones.

Now plug in the powersupply. If the fan comes alive the powersupply is prolly good.

Pull out the wire/paperclip. See the powersupply shut down? Neat trick, eh?
Click to expand...

that can be dangerous...there's a reason why it doesn't work without being connected, it can damage the power supply, and in turn, it *could* hurt you.....

 
Ohhh it wont hurt nuthin power supply, we've dont it fer years without anything shorting on us.?

And c'mon, I've been shocked by some big bad boy powersupply's on our 4U servers, puts hair on yer chest heh. And makes ya leap away from the computer like Kramer enters a room on Seinfield.

Its more funnny then painful...kinda.. heh
 
Ahhh! A beep code helps a lot what was the pattern of beeps and pauses? Award bios?
Click to expand...
its a steady, single beap. The mobo has an LED display that shows you where in the POST it is stalled, it is stalled at C1, or checking DRAM. So I thought my RAM was DOA. So I went down to CC and picked up another chip, that one doesn't work either...perhaps my motherboard is fried after all?
 
What brand of memory is it? it could just be a compatability issue, but if not then it's down to the board being the most likely culprit.
 
if by any chance u r using a WD hard drive... try putting another mfr hd in and see what happens. i have had strange problems like the one u described in rigs with certain WD hds (old or new... it doesn't matter).
 
My soyo board has fan monitoring and shuts down if the CPU fan is not running. The problem: My 80cm fan spins too low so the board always shuts down. I had to connect a fast spinning 60 fan to boot into the bios where I could disable the monitoring.

Another one is my old asus k7v, which is booting for a second after I plug the power in and then shuts down again. Then I press the power button and everything spins up normal. This was confusing for the first time.

 
I went over to a friend's today, he has a working AMD DDR333 system, we swapped out everything, still no good, so I think its my motherboard.
 
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