new system, dead mobo, cpu, psu, or what?

[hannibal67]

I have a biostar 58x motherboard and cooler master 700 watt psu for a new system I'm trying to put together from parts I got from newegg.

I have everything plugged in seemingly properly, but when I try to turn it on, I get nothing at all. No noise from the psu even, though my antec does not get any.

I tried unplugging everything but the power input for the motherboard and the cpu and I still get no response at all. Is there some way to tell what component is causing this without swapping components around? I hate to send this crap back and forth because then if something else is messed up by the time I can check it I won't be able to get any replacement from newegg, not to mention they don't pay for shipping. Also, I really need to get this thing working asap. I have already wasted about a week messing around with my current computer due to getting virus and then realizing that the video was going bad and I can't afford to waste too much more time on this. I guess that's the last time I try to build system from internet parts.

Any help appreciated.

 

[ravenish]

I'm no expert, but if there's no sound from psu you need to start there. No fan spinning in psu means its not working at all. No offense intended, but is it switched on? Did it accidentally get switched to 220v?

 

[hannibal67]

well, I get nothing from my other psu when it starts, either. I might try the other PSU in there, though.

 

[RebateMonger]

2-pin power switch connector from the case is connected to the correct two pins on the motherboard?

20- or 24-pin power connector from the power supply is connected to the motherboard?

4- or 8-pin connector ATX12V from the power supply is connected to the motherboard?

 

[jackschmittusa]

The psu can be tested (quick basic test) by shorting the green wire to any black wire on the primary mb connector.

The pw switch on the case can be eliminated as the problem by removing the connector from the mb and shorting the correct pins with a small screwdriver.

A common problem with your symptoms if improper connection of usb ports to the mb headers, which shorts the 5v on the mb.

Did you test the basic setup on the bench before assembly to eliminate the possibility of an installation error that may cause a short?

 

[hannibal67]

What do you mean test the basic setup on the bench? You mean without being connected to the chassis so that mb headers won't be a problem? I didn't do that because I don't have very much room to work in and the chassis itself is probably the only truly safe place I could set the mb down. It could be the mb headers, but I was extremely careful in my installation of that part. I know I at least got the right ones in the right places unless I had a mini brain attack of some kind.

As for the power supplies, the big one pretty much has to be right, there's just no way it would fit wrong way. I don't really dare push any harder on it, so if it's not 100% in I don't think I can do much about it.

The cpu power is more worrying because the PSU has two 4-blocks for the CPU power and the CPU power slot is an 8 block. I don't think there is any other way to get that thing in there, though.

If the 5v gets shorted, is it permanent? I took off the audio, usb, firewire and just left the fans on it (including cpu fan) and the power switch. The case says for switch the order does not matter, but I have tried it in both directions and am sure I have it on the right pins.

I just checked the cmos as someone suggested and it's in ok position. There's no jumpers for any of that other stuff.

Thanks for help, guys. I will see if I can check PSU. If that is good I think I will just take the machine in to shop and have them deal with it, though I hate to spend the money I kind have to have functioning computer.

 

[krnmastersgt]

Not always just headers, sometimes the boards are touching the case/close enough to cause a short which completely disables your system from running power through properly. In that case, and the one you were worried about, it's not permanent damage (normally) just the circuit is running through a conductor it shouldn't be and thus cutting the circuit short. Taking the board out is probably a good choice, then following the rest of jackschmittusa's advice would be a good idea.

 

[hannibal67]

Thanks so much, guys. It seems that the power indicators on the mb don't come on unless you turn power on for some bizarre reason. I tested power supply then restarted all from stratch on top of the static resistant mb bag. Putting jumper to force the power switch closed made it turn on finally, and then I was able to get it all going. Now all I need is to figure why cox cable won't work on my new machine. I am guessing they bound to my other machine's mac address or something. Maybe I will make wireless network so I can use both.