PC won't boot without CMOS reset

Filipo660

Reputable
Jul 11, 2014
6
0
4,510
Hello everyone,

I know that this problem has been discussed so many times, but I wanted to get a clear answer for my problem. :??:


My problem is that my computer won't boot up, unless I:
a) reset my CMOS (sometimes I have to reset it multiple times)
b) disconnect the power cable (not totally, only about a centimeter) - when i plug it back in, the computer turns on immediately if I pressed the power on button before taking it out

Sometimes, the computer boots up immediately without any need to do these things, but mostly I have to repeat this and sometimes, it boots up about a minute after I pressed the power button.

My system specs are:

CPU Intel Core i7 3770k (has not been overclocked yet)
GPU ASUS GTX660 (no overclock)
RAM Corsair Vengeance 2x8GB 1600MHz
PSU Corsair AX850
MOBO Asus Rampage IV Formula
SSD (system) Samsung 840 256GB

I have tried:
a) the "screwdriver trick" and it was the same as if I was pressing the power on button
b) changing the CMOS battery for a brand new one
c) doing the paperclip test of the PSU, but I guess I failed, because the PSU cables are all black and I just tried locating the two pins to connect by looking up some photos - when I connected them, the PSU didn't "power up" - I did this without anything being connected to the PSU and guess it has some kind of protection that won't power it up without it being under load.

None of the above helped.

I have had my computer for about a year and a half by now and this problem first appeared like two months ago - everything was working fine before, the PC never shut down by itself, etc.. What would you suggest me to try to make my PC boot up "normally"?


Thank you very very much if you got here :)

PS: I am not English, so please excuse any incorrect sentences.
 

Filipo660

Reputable
Jul 11, 2014
6
0
4,510
Things I tried today:

a) updating the BIOS - didn't help
b) booting without the GPU - didn't help
c) retrying the paper clip test - when I turned the PSU on, the fan didn't do anything. When I turned the PSU off, the fan started spinning for about a second, then it stopped. I had nothing connected to the PSU at the moment, so I guess the PSU just automatically turns the fan off without it being under a certain amount of load/reaching a certain temperature. I have recorded this test so I could post it to youtube if you wanted to see exactly what happened.

So I guess the only component left is the motherboard? What do you think?
 

Filipo660

Reputable
Jul 11, 2014
6
0
4,510
I have disassembled the PC, because I thought that the wireless card (the L-shaped holder) was shorting something. This didn't work, unfortunately.

Also, my motherboard is Asus Maximus V Formula, not Rampage IV Formula, my bad.