Computer won't boot

[pastulio]

i just bought new parts, the following:
AMD S754 Sempron 2800+
VIA K8M800 motherboard
XFX GeForce FX5200 128MB DDR AGP8X
Corsair Value S. PC3200 DDR-DIMM 512MB and
Corsair Value S. PC3200 DDR-DIMM 256MB
when i connected these parts i got absolutely nothing on my (working monitor), at first i realised that the PSU had no P4 cable, so i got a new one. Then it worked and everything was going smoothly, i started installing windows xp pro, then about 70-something percent into the installation the computer supposedly rebooted, however since then it has not shown anything on the monitor once more. I have tried to connect just the mobo, monitor, AGPand ram, also cleared the cmos, removed the battery for a few minutes (without the power on..), i have tried using one of the ram, and both of them.. tried with a HD with installed windows, one formatted and many times without.. i just don't know what to do anymore. The monitor just won't show anything, whilst the fan runs perfectly and the PSU is definately working.. as i see it everything works.. just something happened and i don't know what, nor do i know what to do.
please help me, im getting desperate here..

ps: i forgot to tell that there is no sound either, so no beeps to listen to, just the sound of the fan and the PSU

 

[zephead]

running a modern computer without the supplemental (4 pin 12v conn.) will irreperably damage numerous parts, including the psu, cpu, and motherboard. i'd start troubleshooting individual parts, perhaps you should let a local pc repair shop have a go at it, as they will have many known good parts on hand.

PS > use only one stick of ram until you get everything running right. good luck

 

[pastulio]

ok thanx, things don't sound very positive but then again they usually aren't. Was thinking of changing mobo or is that not enough?, i mean must i change CPU as well.. at least i'm gonna lend my friends MoBo and keep you posted if it works :dead:

 

[zephead]

a replacement motherboard usually does the trick in your situation, try that first.