My pc monitor wont display

[chelle]

Hi,
First off i'll tell you my system specs;
mobo: ALiveNF6G DVI
CPU: AMD Sempron 3000+
RAM: Kingston 1GB & Kingston 256MB
Graphics Card: I can't find the Specs for this but it's got a DVI output
Monitor: Plug 'n' Play (with/w/o DVI adaptor)
O/S: Windows Vista Premium 64-bit

I bought a new AMD Athlon 64 yesterday morning and installed it. It ran great from all signs of the fans and beeps. problem was that the monitor gave a "RGB no signal" message. I tried a TFT monitor, and that gave the same thing.

Now my PC will turn on, all the fans working, usual beeps, and then it dies after about 2 seconds. I have swapped power sources to no avail. I put my old CPU back in and it runs fine, with no cutting out. except for the monitor still doesn't work.

I have tried reseting the CMOS battery, i have cleaned all my RAM/Graphics. Made sure the CPU is seated properly. Nothing seems to work.

Can anyone help?

[KristoferB]

It could be many things... but it sound like you could have possibly shorted something out...

did you get thermal compound anywhere you shouldn't have? depending on the type you use some are electrically conductive..

Since it's a video problem though I have to ask are you using the on-board graphics or a separate video card?

if you're using a separate video card then most likely when you reset the CMOS the mobo defaulted to boot from the on-board graphics first.. you'll have to hook the monitor to the onboard video connection of the motherboard and then enter bios to change the settings so the computer boots from external video card first