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  New Custom-Built Computer will not turn on 
 
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Corey L Feb 24, 2010, 03:39pm EST Reply - Quote - Report Abuse
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Edited: Feb 24, 2010, 03:42pm EST

Replies: 14 - Views: 12786
I've been trying to build my new computer for awhile now, for the first parts it wouldn't turn on at all. Fiddling with it, I was able to get the Power LED lights to turn on when I plugged in the power chord, and there would sometimes be a blue LED flash on the PSU when I pressed the power button, but still wouldn't turn on. Someone I know power tested the power supply, and said I should get a new one, so I just exchanged it for the same model, and still the same problem.
So I had to wait another while, and got a different PSU from a different company. Now, when I plug in everything, when I press the power button, all the lights on the Case and Motherboard will flash, and the heatsink on the CPU spins for like half a second, then stops.
I read other people's problems on forums, and have tried almost all, if not all suggestions, and still nothing.
This is really frustrating, my first time building my own pc. :/

My Computer Specs:
- EP45-UD3P Gigabyte Motherboard
- Intel Core 2 Duo 3.0ghz E8400 Processor
- NZXT Apollo Case
- G-Skill 2x2GB RAM(4GB of RAM)
- Nvidia GeForce 8800 GT OC Video Card
- Maxtor Harddrive(Don't know the exact model, took from old Dell PC)
- Creative Soundblaster Live! 24-bit Sound Card
- 1 Sony DVD-CD Rom Drive
- (First PSU) Rosewill 550W (I don't remember the exact model)
- (Second PSU) Corsair TX 850W

P.S. I know people have made similar topics, but they don't seem to be having the exact same problem I'm having... I think... Anyways, help would be much appreciated, thanks!


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kOrny Feb 24, 2010, 04:17pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
It could be one of many things, but for starters.

Are you sure you properly connected the jumpers for power/reset buttons and power/hdd led's? Sounds like you do, but maybe double check in your motherboard's manual.

Try booting with just CPU, RAM, & VIDEO (unplug hard drives, optical drives, expansion cards, etc) and see if you get a different result (you've probably tried this).

Corey L Feb 24, 2010, 04:39pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
The NZXT Apollo has tricky connectors. The chords are labeled, P LED(Green-White), HDD LED(Red-White), SW POWER(Orange-White), and SW RESET(Blue-White).
In the Manual, they're labeled different, but using the manuals configuration doesn't work at all. I've read reader reviews and they say the actual configuration is labeled on the chords, so I already got that right...
This isnt in my first post, but before I even switched any of the PSUs, I thought the issues was the case, so I exchanged it for a new one of the same case... and it was still the same problem; I figured it was the PSU after discussing it with other people(and one of them power testing it).

Yeah I tried that, and just tried it again to make sure; same problems.

kOrny Feb 24, 2010, 04:52pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
I guess it could be a bad motherboard? If you still can't get it to work and if you are still within warranty, maybe try returning it for a new one.

Corey L Feb 24, 2010, 05:09pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Sigh, I didn't want to believe that to be the problem, but you may be right. A friend told me the motherboard shouldn't be the issue since there's evidence of power surging through the board.
I read reader reviews beforehand to see if I could get any related problems with the Motherboard, but most complaints were about some of the RAM slots being defective(which the computer would start up, but the bios setup couldn't read the RAM in the slots; mainly the first slot).

I guess I'll just have to exchange the motherboard, which would be like my 5th exchange so far in building my new pc. If it still doesn't work, guess there goes that new PC :(

kOrny Feb 24, 2010, 06:26pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Yeah well it happens to the best of us. I had a friend who went through a similar problem you were having. Probably returned every part in the computer before he got it to work.

A PC should boot with a motherboard (video to see whats going on), CPU & RAM. If it doesn't its because of one of those parts (assuming the PSU is good, in your case you have tried multiple).

Just because a motherboard is still recieveing power doesn't mean its good. I've seen bad motherboards with onboard lights that were on even when the PC was off. It's worth giving a shot, just gotta be patient.

Meats_Of_Evil Feb 24, 2010, 07:12pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
In the Manual, they're labeled different, but using the manuals configuration doesn't work at all. I've read reader reviews and they say the actual configuration is labeled on the chords, so I already got that right...


Hmm... I would suggest K0rny's advice again and make sure you have it connected the exact same way as the manual tells you. From my experience in the last two builds I did I never got the PC to turn on on the first try. I don;t know why I always get trouble when trying to match the Case's Power cables!


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john albrich Feb 24, 2010, 09:41pm EST Reply - Quote - Report Abuse
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Edited: Feb 24, 2010, 09:52pm EST

 
>> Re: New Custom-Built Computer will not turn on

Re: the 4 cables you identified. ("The chords are labeled, P LED(Green-White), HDD LED(Red-White), SW POWER(Orange-White), and SW RESET(Blue-White).")

Use JUST the SW-Power cable. Leave the others disconnected completely. They aren't needed for the computer to boot, and mis-connecting them might interfere unlikely as it probably is to do so with the boot sequence. By leaving those non-essential cables disconnected it removes ALL possibility they might interfere with the boot sequence.


However, here's why even if those 3 remaining cables were mis-connected, it's unlikely they'd interfere with the boot sequence in your particular situation.{1}.

You've already indicated that when you press the Power button the CPU heatsink fan spins at initial power-on. So it's pretty likely your SW-POWER cable is already properly connected. (since Power-on is activated by what's called an "edge-triggered" signal, even if you had mis-connected the Power switch to the Reset pins on the motherboard, it would not reset the computer and re-start the boot sequence. The computer would first have to have been switched-on for that to occur...and mis-connecting the LEDs or the SW-RESET cable to the Power-on pins on the motherboard would not switch-on the computer unless you had manually pressed the Reset button).

The LED cables only connect to an LED. There is no independent voltage they might inject into the motherboard.{2} Mis-connecting them to just about any of the jumper blocks on the motherboard would likely have little to no effect on system boot operation (as long as your SW-POWER is properly connected). The LEDs themselves however might either light up, stay unlit, work as they should, or indicate some other activity is taking place (e.g. HDD LED might show system power status, or if plugged it into the "speaker" berg-pair might flicker with the presence of any "speaker" output (e.g. any "beep" codes)). Even plugging an LED cable backwards would not affect system booting. Note however, that plugging an LED into the wrong berg-pair might damage or destroy the LED (if either reverse voltage exceeded or forward voltage exceeded or over-current specifications exceeded).

The SW-RESET cable might under unlikely conditions cause unpredictable operation when connected to the wrong berg-pair, but what the worst-case result would be is temporary short-circuit of that berg-pair...but the short-circuit would happen ONLY if you pressed the reset button at the time. That is because both the SW-RESET button and the SW-POWER button (if I remember correctly) are a "Normally Open" switch. In other words, those cables don't connect to ANYTHING until the reset button is pressed or unless something is faulty with the switch itself or the wiring itself (possible but generally unlikely). It's only when the button is pressed that the SW-RESET wires are connected to each other by the reset switch.

There are a few pins that could cause more significant problems if the PW-RESET cable was mis-connected AND the reset button was pressed, but those are unlikely to be the case in the scenario you've indicated.


{1}All discussion assumes the cables, switches, LEDs etc are properly manufactured and in good working order.

{2}It's possible there are some berg-pin pair motherboard inputs that might have a voltage across them, and when an LED is connected to them might cause a problem, but I believe the likelihood of that happening when you're focused on connecting the LED cables only to the berg-pin pairs available on most "front panel" jumper blocks is very remote.


edit:
corrected a mis-pasted phrase re: SW-RESET operation

BoT Feb 24, 2010, 10:41pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
do you have the 4 or 8 pin extra power connector connected?
also make sure that non of the connectors is shortening out
i would unplug all the fans and anything else and power the board only
try and see

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Corey L Feb 25, 2010, 07:20pm EST Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Meats_Of_Evil said:
Hmm... I would suggest K0rny's advice again and make sure you have it connected the exact same way as the manual tells you. From my experience in the last two builds I did I never got the PC to turn on on the first try. I don;t know why I always get trouble when trying to match the Case's Power cables!

I tried the manual configuration multiple times while switching through the PSUs.
The manual configuration has it differently labeled, but its incorrect sense there were no signs of power up at all when using it. I wanted to confirm this problem, and reading reader reviews from newegg(where I purchased the case), some people said they had the same problem, and pretty much solved that problem by using the labels on the chords instead.

BoT said:
do you have the 4 or 8 pin extra power connector connected?
also make sure that non of the connectors is shortening out
i would unplug all the fans and anything else and power the board only
try and see

Yeah...

I'm just going to exchange the motherboard like K0rny suggested. Been patient for awhile, worth being patient for another week or two... sigh... Thanks for all the help everyone, much appreciated. :)

Corey L Mar 15, 2010, 03:22pm EDT Reply - Quote - Report Abuse
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Edited: Mar 15, 2010, 03:24pm EDT

 
>> Re: New Custom-Built Computer will not turn on
Updates -

After about two weeks of waiting, motherboard was fully exchanged. Still the same problems. All the LED lights will flash and the CPU Heatsink fan will flash for about half a second.
Re-tried unplugging things, and starting the system up alone and all that, still no help.
My last bet is the Processor, that's the only thing it can be. I got it in Christmas of '08 and it's a 3 year warranty; I don't even remember what online store I got it from, nor do I have the receipt. Bleh whatever, I'm done with this, bye.

BoT Mar 15, 2010, 04:37pm EDT Reply - Quote - Report Abuse
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Edited: Mar 15, 2010, 04:40pm EDT

 
>> Re: New Custom-Built Computer will not turn on
do you get any beep tone's when you remove the ram?
did you try to power up without cpu, ram only?

did you do a barebones power up? unplug all case wire but power switch, unplug and remove all devices, hdd, fdd, cd/dvd, sound + card, usb, etc

mem and vid only

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G. G. Mar 16, 2010, 12:17am EDT Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Corey

Just send it all to me and i'll test it out for you.... :)

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Meats_Of_Evil Mar 16, 2010, 12:54am EDT Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Oh boy, I feel bad for you man. This is your first time building and you're having such a terrible experience, usually one bad step or two is what most people go through but this is just as weird as it can get.

If I'm not mistaken the motherboard should signal you if there is no RAM, CPU etc. Not quite sure if all of them do it but mine has quite a few ways of telling me whats wrong.

I'm sure you've done this but be extremely sure that you have all of the cables properly connected and aligned. Sometimes it takes a little bit of extra force to wiggle them in their correct position.

And good luck man and please post back your solution when you resolve the problem.

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bossa ritchie Mar 17, 2010, 04:05pm EDT Reply - Quote - Report Abuse
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>> Re: New Custom-Built Computer will not turn on
Have you plugged the Power into the Video Card, most need 1 nowdays and also the 4 Pin Plug have you plugged that in also, you should have 2 plugged into the motherboard and 1 into the Video card if any of these are not plugged in then the computer won't boot but will show power going through, and don't forget the Hard Drice+CD Drive needs power etc etc.


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