Reassembled a PC-problems

[yugom70]

After working for 2 years, my Ibuypower PC would get a "no power to keyboard, mouse monitor" message

So after researching those symptoms , the general consensus was that the power supply was weak so i bought corsair cx430 ...i reassembled the PC back and it doesnt turn on ...as in the fan spins for 1 millisecond and stops and there is no power at all it doesnt turn on.

I disconnected the USB 3.0 cord, the system fan and flipped the SATA cord, and suddenly my PC works? What gives? Is there something wrong with the motherboard?

 

[WyomingKnott]

Replacing the power supply is always a good idea with that brand.
At this point I'd suggest that you don't run the system without the system fan; try re-connecting it and see if the system works.
What do you mean by flipping the SATA cord? SATA connectors can only be connected one way; they are keyed.
Is the machine working now? If so, what problem do you need us to solve, or are you just curious?

 

[yugom70]

I replaced the PSU with a Corsair one...the thing is, here is the problem: if I unplug my case fans, it will boot....too bad I cant really do much with it, it reaches to 70C[150F] in like 7-10 minutes of just browsing Google

If i DO plug in the case fans, it simply refuses to boot up...i press the power button, the power supply fan makes a nudge and it just sits there. You think its the case cords connecting to the MOBO and the PSU?

 

[yugom70]

would buying a big external walmart fan(like the one you would use to cool yourself off on a hot day) be better...? Obviously it will be on a much larger scale than those tiny case fans, i just wont be able to aim it

and the sides of the case will need to always be left open