Help! Problem with my new build

[Alliot]

Hey,

I just upgraded my computer today because of some problems I was having with my GPU and upon upgrading I fell upon a serious problem that wont let me boot (explained in detail below). I used to have 2gb of Corsair Dominator on an ASUS Striker Extreme Motherboard with a ASUS 8800GTX GPU. I was also using a Coolmaster 850W PSU.

The problem I was having was caused by my card so I decided to replace it and while I was at it upgrade to 4gb of ram and get a new PSU (since at the time I wasent sure if it was the PSU or the GPU that was causing my problem). I decided to buy a PC Power&cooling power supply (750W SLI certified), a BFG 280GTX OC GPU and 4gb of G.Skill ram.

I tried to install the PSU on my own but since I had never done it before I took my old one out, got stuck (and was also afraid of frying or screwing anything up) so I waited for a friend of mine to come and do it for me. Friend came today, set everything up for me (New PSU, new GPU and new RAM). Came time to see if it would work... We plugged everything in and hit the power button... The computer started but immediately shut itself off after about a second. I heard no beeps, no sounds and the motherboard LCD screen posted no errors. We tried taking out the GPU and putting my old one in... Same thing happened, computer started up for about a second an then shut itself down. Then we tried taking out the new ram and putting old in, problem persisted. We then tried hooking up my old PSU in and tried powering it up problem persisted (Note, my old PSU and GPU worked I just couldnt play games as I think my GPU was dying on me though I had NO problems starting up or in Windows). We checked the connections, rechecked them, made sure that the PSU didnt have an ampage meter to chage the voltage/current... Finally we figured that the PSU had been defective and might have fried my motherboard or maybe worse. I don't know what to do about this!! Can anyone help?! Has anyone had this happen to them before? To recap my motherboard lights up when plugged in, ethernet is detected (and glows as usual), my keyboard lights light up, the LCD screen on my motherboard light up. Please help if you have any experience in this domain.

Thanks!!

Edit: We where VERY careful about frying anything, friend used anti static bracelet and we where cautious not to touch parts directly. Not saying it couldn't have happened, but we where being careful.

 

[chookman]

more than likely you dont have the addition 4/8pin CPU power cable plugged in to the motherboard.

 

[Alliot]

The 8 pin CPU connector was plugged in. Thanks for the input though.

 

[JohnnyLucky]

Try clearing the CMOS.

 

[Alliot]

Im pretty sure we tried doing that on the board itself (little button to clear it on the motherboard) Didn't help.

 

[ulysses35]

You didnt say which operating system you have - but this could be important as one of the points you mention is the upgraded memory, presumably from 2gb to 4gb ?

I know for sure that Vista 65 can have problems using more than 2gb without a patch - might be a shot in the dark.

 

[Alliot]

Was running Windows XP Sp2. If all booted well was going to upgrade to Vista 64x

 

[mike99]

Is CPU fan running? You may have dislodged lead to motherboard. Did you fully insert the new memory? Have you tried one stick at a time? Have you tried putting it back as it was, then trying one change at a time?

Mike.

 

[ulysses35]

Best bet is to remove all your memory modules... unplug any CD/DVD drives and HDD's then try powering up the pc. (no beep / display means your MOBO may be defective)

If you get any form of display messgae or beep then that would rule out a dead MOBO - from here you can power down and start adding components one by one until the pc will no longer power up.

I