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After switching cases, computer will not power on

by nemongt / December 26, 2003 5:26 AM PST

I recently switched my computer from my original case to another. I have everything plugged in correctly, as far as I can tell, but when I try to power it on, nothing happens. The power supply is plugged into the wall correctly, and when I flip the switch there is no small fan spin-up that used to happen with my old case. Additionally, when I press the power button on the case front (which I believe is connected correctly) nothing happens. Could my motherboard be damaged?

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(NT) Work backwards. Remove from case, check for extra mounting posts that may short out the mainboard. Use less cables and cards.
by R. Proffitt Forum moderator / December 26, 2003 5:38 AM PST

.

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Re:(NT) Work backwards. Remove from case, check for extra mounting posts that may short out the mainboard. Use less cables and cards.

Ok. I've done that, checked the mounting posts, tried with no expansion cards in, still no effect. I have only one power from the power supply to my motherboard, which I think is correct for my AI61, I checked the manual. Is there a way to test my power supply independently of the motherboard so I can verify that it's not the problem?

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I'd move to cardboard...

But you ask "Is there a way to test my power supply independently of the motherboard so I can verify that it's not the problem?"

http://www.compgeeks.com/details.asp?invtid=ATX-PT shows a basic tester. What I use is what I have. An older ATX motherboard (no CPU or such) and a voltmeter.

But I'd move out of the case and onto cardboard. Or why not use the power supply you used to have? Did it work OK.

Let's also note that very little has been shared about the machine. Today's monster machines are best fitted with 450 Watt or higher power supplies. I've seen what too small supplies can do.

Bob

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Re:I'd move to cardboard...
by nemongt / December 26, 2003 7:13 AM PST

I went back to my old power supply, which seemed to do the fan spin up correctly. The only difference between the load on my old supply (250w) and the new one (350w) is one hard drive, so I don't think that should make enough of a difference. I guess I don't see why I have to move to cardboard, that sounds like a pain, should what I've described above indicate that the power supply is shot?

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Re:Re:I'd move to cardboard...
by nemongt / December 26, 2003 7:17 AM PST

About what you said before, "today's monster machines". This machine has only 3 cd drives and 4 hard drives running (2x 30gb, 2x160gb), as well as the case fan. As I said before, I only added one 160gb drive to the load, whereas I added 100w to the supply. I don't think this is a problem.

Thanks,
Chris

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You may be surprised...
by R. Proffitt Forum moderator / December 26, 2003 7:42 AM PST

That too many 350 Watt supplies are really about 60% of that number. The makers have reverted to "PEAK" ratings and don't share continuous operation numbers. Your 250 Watt supply may have more REAL Watts.

You've found your issue and need to obtain a whopper 450 Watt supply or exchange the defective 350 or keep the 250.

Your choice.

Bob

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Re:You may be surprised...
by Michael Geist / December 26, 2003 9:32 AM PST

Check the voltage selector switch on the power supply for the correct setting to your voltage supply.

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Switched cases...everything same....system won't start up
by thered / January 8, 2005 8:55 AM PST

I have a similar problem. I have a computer that I only switched the tower case and unfortunately my computer will not turn on. This is weird...after I placed everything to my new case and flipped the power switch on the power supply, the fans in my computer runs, even my cpu fan that is plugged in to the mobo (so i am guessing that it is not the mobo?). I am not able to turn off my computer with the power/reset button from the front panel (I have checked the connections numberous times), but only through the power switch from the back.

I have checked the power supply w/ a smaller voltage one and the problem still persists. I also have only plugged in the power to the mobo and my hard drive solely and it seems that the same problem is present.
I have also took everything apart and placed it back in to see if that is the case but again that did not work.
I have even went back to putting all of my computer back in to the old case and suprisingly the same problem was present...So I am guessing that I might have damaged something along the way of putting everything together in my new case?

I have asked around and looked on forums and I am still hopeless for about a week now. Any help or suggestions would be very much appreciated in my matter. Thanks a lot!!!

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