My pc is not starting

[Abhigawande8]

few days ago I saw a spark from my power supply and my pc didn't start after that so today I replaced my power supply with new one and its still not working whenever I hit the power button the power light blinks for a second then nothing.... After just removing the 4pin auxilliary connector from the motherboard and switched the power on, it worked, the power light was on and my Cpu fan started but I switched power off after 5sec because I was not sure about function of auxilliary connector. Then I again did with connecting the auxilliary connector and it didn't work just the blinking. . Is auxilliary connector necessary, if yes then what can I do to fix this problem
My motherboard is gigabyte GA-M68MT-S2 it have a 24 pin atx and i also have a nvidea gt520 1gb

 

[periman2]

Please give all your system information. CPU and Power supply brand and model and Watt number. In first look it's either a bottleneck that your PSU makes or a hardware problem, propably from the motherboard.

 

[Abhigawande8]

My new psu is intex TECHNO 450w 20+4pin
Cpu=AMD athelon x2 260(3.2GHz)
My previous psu was of a local brand and it was also 450 watt it worked fine for almost 2 years

 

[periman2]

can you plug the auxilliary connector as your main to see if the motherboard slot is avtually damaged or not?

 

[Abhigawande8]

Can you please explain with some detail. I am kind of newbie for these things