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Discussion Starter · #1 ·
Upon returning home from work, I noticed that my computer tower was off. So, I pressed the power button. Nothing happened. The power supply is working just fine, because the motherboard light is on. What could be the problem?
 

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Discussion Starter · #3 ·
Switch on the Power Supply?

If you're referring to the surge protector, I've already tried that. Upon unplugging the computer, the motherboard light went off. Everything else that was on the same surge protector works just fine. Now, if you're referring to a switch built into the power supply inside the case, you'll need to educate me on how to find this switch, because I didn't know there was a switch there.
 

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Discussion Starter · #6 ·
Specs

1.7 GHz Pentium 4 Processor
64 MB GeForce2 MX 400
40 GB Hard Drive
Windows XP Professional

I'm not really sure what other specs you'd like, so just lemme know.
 

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Discussion Starter · #8 ·
Okay…

The wire is connected to the motherboard just fine. And - like I said - the motherboard light is on. I've tried jabbing the button harder, but the computer still won't turn on. Do you seriously think I should get a new power supply if the motherboard light is on? And how much would one cost?
 

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Discussion Starter · #11 ·
Removing a Power Supply, etc.

Well, I'm using my cousin's computer right now. Would I just be able to remove his power supply and try it in my computer? Mine's a Dell, and his is a Gateway. I mean, are all power supplies compatible with all computers?

As for the motherboard light, yes, I'm referring to the LED that's right on the motherboard itself. I have the case open, and nothing else responds upon pressing the power button. The motherboard light is on as soon as I plug in the computer. No fan or hard disk response, no odd noises, no CD-ROM functionality, no nothing. I'll try the other power supply, assuming that it'll work with my computer. All I need to know is whether or not it'd be compatible. I've never replaced a power supply before.
 

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Discussion Starter · #13 ·
Problem

There's a small problem with substituting my cousin's power supply for my own. There are two sets of cables that need to be connected to either motherboard. While one set will hook up properly, the other set isn't identical. Mine accommodates 4 pins, whereas my cousin's accommodates only 2 pins. Do both sets of cables need to be connected properly, or would one set suffice?
 

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Discussion Starter · #14 ·
One Quick Question

By the way, there was something confusing me about the previous posts in this thread. If the problem IS the power supply, is it still possible for the motherboard light to be one? I don't exactly understand the workings of the power supply in relation to every component within the tower, so could someone explain how the motherboard light would be on if the power supply was bad?

Also, any tips on what I could try if I can't find a power supply that'll connect to my computer (without having to buy one)?
 

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Discussion Starter · #15 ·
Power Supply Operational

Well, the power supply works just fine. I attached the one cable from my cousin's power supply that would connect correctly to my motherboard and plugged the computer in. The motherboard light came on again, but nothing happened upon pressing the power button. Then, I connected the one cable from my power supply to my cousin's motherboard and plugged it in, then turned on the computer. The fan on the power supply started spinning. Definitely a good sign. Now that the power supply has been confirmed as working, should my next concern be the power switch itself?
 

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Discussion Starter · #23 ·
Processor Reseated

Well, I reseated the processor. It really didn't change anything. Everything's properly seated, in fact. Getting back to the power supply, though, the fan didn't even kick on in my computer, whereas it did in my cousin's computer. Now that the processor has been verified as properly seated, what should I do?

I'm trying to figure out what the problem could be. Honestly, I thought maybe it could be the power switch, but I couldn't understand why it would've turned off in the first place. Exactly what could've disrupted the operation of the computer in order to turn it off, yet have nothing to do with the power supply? I mean, it doesn't even respond in the slightest when I press the power button, so shouldn't it have something to do with the switch?
 

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Discussion Starter · #26 ·
One Concern

I opened up the power supply, and I noticed that there was some sort of white…something…all over the place on the inside. Now, I'm not exactly sure if it's actually a problem or not, as I tried to scrape some of the substance off with no luck. I could take a photograph of the inside to show you what it looks like, if that would help.

Now, it's not as though I'm questioning anyone's knowledge of computers, but you guys DID note that my power supply worked in my cousin's computer, while my cousin's power supply didn't work in my computer, right? I mean, his power supply worked fine in his computer, but it wouldn't do anything in mine?
 

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Discussion Starter · #28 ·
Fried Anything?

I've had a fried processor before. Actually, twice before. Thing is, though, that it never prevented the computer from powering up. Sure, it wouldn't boot properly into Windows, but it'd still at least respond by TRYING to boot. I'll check all of the cards, though, to make sure they're properly seated. Also, I'll try removing one of the RAM chips at a time and trying to power up the computer with only 256 MB of RAM. I actually have a total of 512 MB.
 

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Discussion Starter · #30 ·
Nope

I never tried to get it to boot into Windows. Remember how I said that there were two connections that go to the motherboard on each power supply, and that the one wouldn't fit on the other computer? I highly doubt I could get full functionality out of my cousin's computer if the power supply wasn't fully connected. I could probably hook up the drives and such, but couldn't the second connection's absence pose a problem for booting correctly?
 

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Discussion Starter · #31 ·
Caps

By the way, I couldn't find a broken cap or anything. That doesn't necessarily mean there isn't one, though. Still, maybe I'll try to boot my cousin's computer completely with my power supply, despite it not being fully connected.
 

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Discussion Starter · #33 ·
Adequately Tested

So, by 'adequately tested', do you mean I should try booting my cousin's computer with my power supply, or do you think I should have a professional take a look at it?
 
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