MSI P67A-G43 (B3) LGA 1155 Intel P67 wont BOOT!

[aslator]

My pc
PSU:Ultra 650w
CPU: Intel Core i7 2600k
MOBO:MSI P67A-G43 (B3) LGA 1155 Intel P67
Video Card:ATI 6950 GIGABYTE 2GB.
HDD:SEAGATE 1TB
RAM: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL


Explanation

I recently changed my motherboard from gigabyte+amd 955(worked flawlessly) to an intel core i7 2600k and the current mobo, i kept all the previous components and now i am having trouble booting up my pc. It starts and all the comps seem to work no beep but the monitor LED turns off and on and there is not even a "no signal" notice therefore i dont think its my video card causing the issue.

What could it be? I heard that CPU is the least faulty component.

Is the memory compatible or should i switch? worked fine on previous build.
Or is it the mobo?

 

[HU16E]

Fresh install of OS, or did you migrate the OS HDD direct from the other rig? Try removing the PSU power cord, clearing CMOS, place only a single RAM stick in the primary blue dimm slot & try again. Latest final release listed at MSI Global Website is BIOS version 1.A. Improved RAM compatibility was noted.

 

[FirstSandy]

Make sure that you formatted your HDD, because if you have a previous OS installed you might get problems with the motherboard. Reinstall all cables and only use one stick of ram. Try putting it in each slot, should work on the closest one. How many LED's do you have on?

 

[aslator]

Thanks for the help it happens that it was my dumb monitor not working in hdmi or dvi controller.  Funny cause the component works fine on my ps3.....

So no problem whatsoever just my monitor worned out and needs to rma because its been only 1 year.

But before you leave i had to remove the cpu to check if i put it right... and maybe some thermal contact worn off a little bit because the motherboard bios in the OC section is displaying 55 degrees celcious is that normal(the bar reaches red section)? Room temp 74 degrees. also hardware monitor displays 40 degrees celcious each core Which one should i believe.

 

[dilburt]

If you removed the CPU, then you need to clean off the old thermal compound from the CPU and heatsink then replace it with new compound.  Arctic Silver is a good product and their website has great instructions on how to do this work.

http://www.arcticsilver.com/as5.htm

- D

 

[NovJoe]

Room temp at 74c should be in Fahrenheit whereas, the monitor utility is displaying in Degree Celsius.

I would not want to be in a room of 74 Degree C.