Motherboard defective or processor damaged

[Mayur_Jain]

I have a PC kit with components selected by myself. I mounted it without problem, but I have a problem with the 4 pins of the CPU auxiliary power supply (top left)

Motherboard : Asus M2N68 (socket AM2+)
Processor : Amd Athlon 64 7750 X2 dual core socket AM2+ (quite compatible)

The pc is running 2 seconds then stops when I leave the power supply plug 20 + 4 pins, + 4 auxiliary pins. pc turns on and do nothing when I let the power supply plug 20 + 4 pins only (regular) music. I disassembled then reassembled everything, and there when I plug the PC is running but does nothing. I changed my graphics card (in case) but the problem is not it. I changed my psu, always the same.

Motherboard defect? Processor Damaged?

My power supply is LC Taurus 480W (new)

Any idea? I received the new motherboard, but still the same problem! incompatibility with the processor

[Marthaz]

Several possibilities such as

The screen is black? blue? PC restarts himself? all cables are plugged in?

[Alexisus]

You have tested your other materials: RAM (if you have 2 strips, test them one after the other), and your graphics card, some times the video cards will cause such problems!

[Mayur_Jain]

the screen is black, nothing happens.
no, the PC does not restart.
yes all cables are connected

I tested with 4 other strips of RAM, same (also with another graphics card). I conclude that this is not the motherboard that disconnected but the processor! I tried another power supply, an Antec 430 W (the one I use on my PC), no improvement.

Without RAM strips, the motherboard does beep.

[Alexisus]

In view of what you have done to change motherboard, power supply, RAM strips, graphics card, it can be inferred that your processor a stab in the helmet. Otherwise, what is your hard drive (brand model?) Because I had a diamond MAXTOR 500GB and one day he went into security and therefore nothing at startup (black screen) with the HDD LED sets.