No post/beep and 1 green led on bracket

OK,ive put it all together and im not getting any post  screen or startup beep,the only indication i have is 1 green led on d bracket (number 3) with all others red(the manual states that this indicates initialising keyboard controller).I have tried different keyboard and i have tried booting with nothing else connected but this is all i get.Any ideas or is my MB U/S?

Ignore that,here it is.
184 edge connector pads
Clock Frequency: 200 MHz
SSTL-2 interface: 2.5 Voltage +/- 0.2V
256MB  32Mx8 (x8)  non-ECC DDR SDRAM  
512MB 32Mx8 (x16) non-ECC DDR SDRAM
 Specifications
 JEDEC Standard
Bandwidth(max)¡G3.2GB/s
Date Rate¡G400MHz
Double Data Rate architecture
Bi-directional data strobe (DQS)
Different clock inputs (CK and /CK)
MRS cycle with address key programs
* CAS latency: CL2 , 2.5
* Burst length: 2, 4, 8
* Burst type: Sequential & Interleave
WLCSP package
*The smallest original chip dimension
*High stability of data transmission
*Good heat diffusion
2 variations of refresh
*Auto refresh & Self refresh
Edge aligned data output, center aligned data input
2 banks to be operated simultaneously or independently

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