Problem.. new PC boots up but screen won't post.

[SofaKing]

here's my setup:
ECS N2U400-A Mobo
AMD Sempron 2200+ Thoroughbred
1 stick of Mushkin 512 MB PC 3200 RAM
Seagate 80 GB 7200 RPM drive
Antec Smartpower 300 watt PSU
Lite-on 16x dual layer dvd burner
Asus 64 MB Geforce2 MX400

Computer boots up, but nothing shows up on the monitor. I'm sure it's nto the videocard's problem because i JUST got an rma replacement for that.. also the PSU is brand new and i doubt it's the PSU's problem. IT boots up , fans run and all but just nothing shows up. What could be the problem? Please help me out! Thanks in advance

 

[SofaKing]

bump

and by the way, there's no bios beeps either..

 

[thescreensavers]

ya it has happend to me and i have posted but no one answers i have no bios beeb ether all i have is a d braket that tells me what happening well it staed at 4 light wich ment the cpu was not put in properly or damaged i take it out and all the pins are fine so i rmaed it but i get no bios beebs when i removed the memory

 

[SofaKing]

I thought it was a CPU problem too.. but that's strange. The CPU is brand new.. could it be that I put on the heatsink the wrong way?

 

[SofaKing]

And also thescreensavers.. after you RMAed the cpu was it fine?

 

[thescreensavers]

i havent recived the replcement yet when i do of cores ill check and if it still doesnot work i will RMA my mobo. i will just keep rmaing till every thing works lol

it was the 4200

 

[SofaKing]

ah ok, thanks for the help thoguh

 

[thescreensavers]

i will reply o this msg whn i fix my problem