Asim,

Open the M600 and remove each card,  Then power up to troubleshoot.  This will isolate the issue to the mezzanine card, controller or motherboard.

Here is  a link to the manual pdf: ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_poweredge/poweredge-m600_Owner%27s%20Manual_en-us.pdf  that will assist you in the process.

Regards,

There is only a SAS and Video card, should i remove both and then power on my machine?

Try the SAS controller first, then reseat the video card.  Without the card, you won't see if the error remains.

Regards,

I've already done that i removed SAS card and then inserted Blade in Chassis but error was there.

If the error remains with the SAS card out, the error is on the motherboard and will need to be replaced.