Building Computer and no power ?

[pint123]

i am building a couple computers and i have done everything by the book, but when i go to boot em up there is nothing no beeps nothing only hting i noticed was the keyboard lights flash off and on...i checked ram from a running computer using same motherboard...i am hopeing someone can point me in the right direction ?

 

[smah]

Does the processor fan even spin? Double (or triple) check the leads from your power button to the motherboard. Unplug and remove everything except, ATX connector to power supply, case speaker, processor (and fan of course) and power button leads. Any beeps now? If still no, check power supply first, then processor.

 

[pint123]

nope processor fan does not even spin...i tryed disconnecting everything except for the processor which came built in...even with the switch wires disconnected should the unit not still power up in some way ?

 

[pint123]

also i am building 2 new computers and both are doing same thing...its obvoiusly something i am doing wrong but this 1 has me stumped...1 more ? for ya, if i had the switch wires on wrong on the first computer when i started it up can this cause any damnage to the MB ? i had the wrong at first but did it right on second computer so i dont think this could be a problem either, just throughing all options out here lol

 

[ANFPS26]

Make sure the 110/220V switch on the PS is in the right position. It is usually a red slide switch--sometimes black. Jim

Please come back and let us know if your
problem is fixed and what fixed it!!

 

[smah]

You can skip the case switch if you're VERY careful. The case switch is just a momentary connection between the two motherboard terminals that it's attched to. So, b]VERY CAREFULLY[/b], you can use a screwdriver or other metal object to briefly connect the two motherboard pins that go to the power switch. Make sure you use the right pins.

Also, as stated before check the setting of the power supply. The atx plug must be connected to the motherboard and keep the case speaker plugged in so you can hear any beeps. Of course, the wall outlet and powerstrip that you're using must be ok also.

 

[mainegeek]

Make sure you didn't put extra "stand off's" in
when you were mounting the mobo's. There could be one causing a short. Make sure that the IDE cables are not backwards (if attached)

Also try a different power source. If you are connecting through a new UPS it may require charging first.

What cpu are you using?

 

[gargouille]

Is there a rocker switch on the power supply?
(forgive me for asking the hard question: drawing straws)
Surely you would have gone there...
IF you do this very often, you'll wanta' consider getting 1 of the Antec power supply testers...cheap and pay for themselves very quickly when you consider the times you have to use it to remove the PS from the equation.
As for the polarity of the switch set wrongly adversely affecting the board, thankfully not! They just don't work.

 

[Najemikon]

Can't say I can give you anything solid, other than my own experience. When I've had this in the past, I've gone right to the point of pulling my hair out in frustration! The power supplies often seem to have to be connected to the motherboard before they'll do anything, therefore you can't tell just by plugging them together if the fault is coming from the supply, the motherboard or the CPU even.

I'm useless round electronics so in this situation I always toss the supply to my dad who tests via a meter that the power is getting through the thing. Thinking back, its turned out to be the supply only once; the mainboard or CPU has been the stumbling block on all other occasions. Is there anything on the boards that can regulate the power input? A jumper maybe? Reaching now!

 

[gargouille]

To all who're watching followups:
pint123 has moved on to the second machine, and has another active thread involved with getting that one to work!
Asked for followups, but as yet, nada...

 

[pint123]

ok heres the deal i pulled the mobo back out and used the plastic type mounting screws and cleared the cmos then added 1 item at a time and she worked gr8...my theory is that i turned the metal screws to hard and shorted the board out.
Now as for the second puter that i built, what i did was tryed switching the power supply wires from the system i knew was running and it worked...with testing the switch wires and that i came to the conclusion that the power supply is the problem, now i am not sure if maybe the tightening of the metal screws to much shorted something out and caused the power supply to malfunction or if the power supply was screwed right from the get go...i guess this is a learning process Anyway TYVM for all the help everyone much appreciated !

 

[gargouille]

And thank you very much for providing us the feedback...glad you're getting it worked out. One of those terribly wonderful experiences, huh?!

 

[pint123]

all part of the learning process i guess lol
Sorry it took so long to post results but i got a bit hammered after getting so frustrated last night and just woke up, anyway thx again everyone