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Not Booting, Full Power, No Display

Okay, i got this PC off a friend and after testing all the components, everything seemed to be in order and yet it still didn't boot, so i assumed it was either the motherboard or the cpu, i managed to get a beep out of the board when i removed the ram, which if i remember correctly, meant the pre-bios checks were still working and that the cpu was ok, today i recieved the new replacement motherboard and i am still stuck with the same issues.

I hit the power button, everything recieves power, the memory led comes on (which is good) and that's it... It obviously isn't booting and there is no video output, onboard and through agp.

The keyboard blinks when plugged in, but then Numlock etc. do not affect the LED's on it.

Now since i am very annoyed, i am offering 500 points to who ever can help me find what's going on.
And 3000 points if i can actually get it working without me having to buy a new CPU or any other major components.

Any help would be greatly appreciated.
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sciboy
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sciboy
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nobusCommented:
boot with the minimum  :
mobo + cpu + 1 ram stick, video card, keyb + mouse. can you boot now?  can you get in the bios?
then add devices 1 by one tilll the bad guy is found.
Do you have enough power? check it here :   http://www.jscustompcs.com/power_supply/      
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sciboyAuthor Commented:
I booted with: No Cards, No Drives, 1 Stick of RAM and a Keyboard.
Plugged into onboard video, Still no change.

The power supply is 300w which i believe is more than substantial.
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nobusCommented:
>>    which i believe is more than substantial   <<  with nothing connected, probably, but i would not be too sure if you connect everything - just check it out to be sure
try also other ram, and another video card, even a cheap PCI one will do for testing
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sciboyAuthor Commented:
I've tested onboard and agp, the agp card has been tested in another computer is in working condition.
Unfortunately i can't use that link you gave me since it uses Flash.
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sciboyAuthor Commented:
Tested with 4 other sticks of RAM, still no change.
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nobusCommented:
then i guess it's about time to declare a bad mobo or cpu.
BTW - did you try another power supply ? that can cause it too
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sciboyAuthor Commented:
What would happen if the CPU is faulty?
This is a replacement motherboard, and i'm sure both of them can't be wrong.
I haven't tested another power supply yet.
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nobusCommented:
>>   What would happen if the CPU is faulty?   <<   difficult to tell. it depends on what actually is wrong with it.
you can try to test the cpu on a compatible mobo (which is actually what you did)
   Since it displays the same issues, i would think it is the CPU (since you swapped the ram also)
if you can get your hands on a PSU - always good tot test that also, before buying  a new cpu
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sciboyAuthor Commented:
It's a Prescott, there's no one else i know who has one. =|
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nobusCommented:
i agree, it's not always easy; but try testing the power supply
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sciboyAuthor Commented:
It just came to my attention that my brother has a Prescott and is willing to let me test it on Sunday.
Thanks for helping out.
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nobusCommented:
you're werlcome - and have fun !
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