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Custom Build Quit Working


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#1 NeoAbel

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Posted 19 November 2008 - 09:26 PM

I built this desktop six months ago, and it has been running perfect until last week. I installed some cold cathode lighting tubes (which work) and when i went to power the PC back on, nothing came on the screen.

-When I press power, the power supply kicks on and powers everything it is connected to (Optical drive, motherboard, GPU, HDD, etc.)
-The lights on the motherboard come on, and devices such as system fans that are only connected to the motherboard work fine.
-This made me thing graphics card, but there are two problems with that
1)The graphics card powers on just like all the other hardware when i press power.
2)Even though the PC powers on, The front LED's for power and HDD use DO NOT light up like usual, leading me to believe it is still a motherboard issue.

Any thoughts/ideas/suggestions are welcome. I'm stuck here! Also, for my display I am using a SDTV, connected by S-video on the GPU. I have also disconnected all unecessary components (optical drive, wifi adapter, card reader, etc.)

Edited by NeoAbel, 19 November 2008 - 10:36 PM.

XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)

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#2 DJBPace07

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Posted 20 November 2008 - 12:33 AM

Are you even able to get POST? Check all connections on all cables, even the non-power ones. The motherboard could easily be having problems, this is more so if you don't get POST. If your mobo is new, you might be able to RMA with the manufacturer or the vendor for a new one.

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#3 NeoAbel

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Posted 20 November 2008 - 01:05 AM

Ok just had my first bit of luck with POST. The display came up and everything did what it should in post mode. I guess now its a matter of adding components on one by one and seeing what happens?
XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)

#4 DJBPace07

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Posted 20 November 2008 - 01:21 AM

Yep, you can do that. It's time consuming, but it is really the only way to test for some types of hardware issues.

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#5 NeoAbel

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Posted 20 November 2008 - 02:40 AM

Problem solved. I'm still not sure exactly what was causing the problem...I have every piece of hardware connected back now. I think it was something to do with the LED headers or the 24 pin MoBo connection. In any event, thanks for the POST idea to get me rolling, I'm glad this thing isn't fried.
XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)

#6 NeoAbel

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Posted 24 November 2008 - 02:20 AM

Ok so everything worked perfect for a few days, then I went out of town for the weekend. I come back and power on - now I'm right back where I started when I first posted. No one was even here to mess with anything. What could be the problem????
XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)

#7 hamluis

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Posted 24 November 2008 - 11:46 AM

I'd start with the power supply as a candidate.

<<...installed some cold cathode lighting tubes (which work) and when i went to power the PC back on, nothing came on the screen.>>

You may want to consider removing such, if the system was flawless before this.

From http://en.wikipedia.org/wiki/Cold_cathode :

"Cold cathode devices typically use a complex high-voltage power supply with some mechanism for limiting current flow."

Louis

Edited by hamluis, 24 November 2008 - 05:09 PM.


#8 Sneakycyber

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Posted 24 November 2008 - 04:44 PM

What Size power supply are you using and what is the conifiguration of your build. You may have reached the limits of the power supply.
Chad Mockensturm 
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Certified CompTia Network +, A +

#9 NeoAbel

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Posted 24 November 2008 - 06:25 PM

Ya I removed all the cold cathodes as soon as all this started. My power supply is a 700W Rocketfish, and all the specs on it are well above what I should need for my setup. I actually tried a different power supply and nothing changes. It just seems very odd how it worked perfect, then nothing, then perfect, now nothing again.
XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)

#10 garmanma

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Posted 24 November 2008 - 06:50 PM

You could do better:
http://www.hardwaresecrets.com/article/556
Mark
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why won't my laptop work?

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#11 NeoAbel

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Posted 24 November 2008 - 07:56 PM

I know it's not that great, but it is ample to do the job. I got it because I work at Best Buy and get a massive discount. Anyway, like I said, i switched out power supply's (Tried a BFG 650W) and nothing goes any different.
XFX 680i SLI Board w/ Intel Core 2 Quad @ 2.4Ghz
Nvidia 8800GT 512Mb DDR3
4Gb DDR2 Memory & 500Gb 7200RPM SATA HD
Rocketfish 700W Power Supply
Windows XP Pro (LastXP)




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