Question PC boots on and off in a loop


Dec 29, 2013
Hello, I built this PC for my Mother a few years back and it never gave any trouble. Well I guess the other day my dad wiggled the mouse and it never woke up so he pressed the power button and this is where the issue begins. The PC kicks on every fan, Case and CPU and then back off then on then off and so on....

Here is what I have tried:
1. Replaced power supply with brand new one, Same issue still....​
2. Removed switches from motherboard and turned on using button on motherboard to see if we have a bad start switch, Still doing it.​
3. Tried new ram and tried different slots, still doing it.​
4. Removed video card and started PC, still doing it.​
5. Removed HD and Optical drive power and tried to boot up, still doing it.​
Here is some of my parts list:

PC PartPicker LIST
  1. Intel Xeon E3-1231 V3 3.4 GHz Quad-Core Processor
  2. Asus Z97-A/USB 3.1 ATX LGA1150 Motherboard
  3. Crucial Ballistix Sport 16 GB (2 x 8 GB) DDR3-1600 CL9 Memory
  4. EVGA GeForce GTX 750 Ti 2 GB Video Card
  5. Corsair CXM 750 W 80+ Bronze Certified Semi-modular ATX Power Supply