Hello all, I just wanted some community feedback regarding a problem I've been having with my computer. A few days ago I removed my OS drive from my desktop and used it in a family members laptop. Ever since then when I try to boot my desktop PC up it will just turn on and then off repeatedly. I immediately checked any wires or screws that could be shorting my board or if I somehow dislodged the CPU an or 24 pin cable. Everything was connected. So that is when I started to sweat. before I continue specs.
CPU: i5 4570 haswell
Mobo: Asus Z87-C socket 1150
RAM: 16gb 1600mhz Corsair Vengeance LP
GPU: Asus Strix GTX 970
PSU: Corsair CX 600 non modular
Drives: 1x 1TB WD black and 1x 1 TB Seagate Barracuda.
1x Asus 16x DVD burner
5 case fans plus Heatsink fan
Hyper 212 Evo heatsink.
So after I checked to make sure nothing was disconnected I removed the power supply and tested it via the paperclip method and using a multimeter. I tested the power supply twice. the 12v volts rails were all good, if not a bit more than 12 volts, the 5 volt rails were good, as well as the 3.3v rails. the only wiring that concerned me was the BLUE wire on the 24pin connector which read -11.30 volts, to which it should read -12 volts. Now I believe the +/-12V rails all have a +/- 10% discrepancy so -11.30 should be fine as a reading, but other than that one reading nothing else seemed to be wrong with the power supply, as it powered on my fans, no strange smells or capacitor bulging.
So my next test was to disconnect everything and test the system to see if it was a possible component shorting the computer. So only having the CPU, motherboard and a single stick of ram installed I began testing the RAM slots. When I did this I was able to boot to the system bios all with but one of the sticks of ram. So at this point I figured it was a bad stick of ram. I connected my drives an reinstalled windows. However while I was in windows I did notice that when I booted straight to the bios I would get a "overclock failed" message and I would have to reconfigure my system in the bios.
So I went back into the bios and noticed that my RAM was being defaulted to 1333mhz while my RAM was rated at 1600mhz, I also noticed my chaFans were all spinning at 600rpm with exception to my cpuFan which was in the 1800rpm realm. So I tested the the ram again and this time some of the sticks of ram that had no issue before, were now causing my computer to turn on and off repeatedly again. I repeated my process an got the computer to boot again. now being down to two sticks of ram.
So after finally having the computer to boot again, I shut down the computer, unplugged it and took a break for a while. When I returned, the same problem persisted. Turn on computer only for it to shutdown and boot up again immediately after, repeatedly, never even getting to the BIOS or windows screen.
So at this point I am thinking it is a Motherboard problem, I've heard something about the CMOS battery being screwed but I don't know if that would cause such an erratic shutdown and reboot frequency. So if anyone that has had a lot of experience dealing with this problem or any type of tech sage could lend some feedback, that would be most appreciated.