I have a strange issue with my PC since last week-end.
I've already posted this on the forum of Asus for my motherboard, but since I don't think too many people were checking that thread, I was thinking of trying to get help here, since this seems to be a nice and active community.
My PC is most of the time turned on, but a few days ago, I wanted to put it in sleep mode because of the warm weather we had last week-end (the room the PC is in was getting a bit too warm).
The issue then was that each time I put it in sleep mode, it was turning back on after a few seconds.
I didn't pay much attention to the issue at the time, and decided to shut it down instead.
It shut down correctly without any strange issues, but when I tried turning it back on the next day, it wouldn't boot anymore.
The first strange thing was that the power button on the tower wasn't doing anything.
I then decided to use the start button on the motherboard itself and it turned on.
It goes through quite a few QCodes, but after 9C, 99 and B4, it just turns off and starts again (I have to turn off the power supply to stop the cycle).
Nothing is ever displayed on the screen.
Since the B4 code seems to be related to USB hot plug, I tried disconnecting everyhing connected in USB (including the internal USB that connects to the tower's front USB's), but it didn't change a thing.
I also tried booting in safe mode with the corresponding button on the motherboard, but the result is the same.
I thought it could be related to the power button of my tower because of the strange behavior I had when trying to put the computer to sleep mode first, then whenI couldn't turn it on with the tower's power button, so I tried unplugging the tower's power and reset cables (as well as the LEDs and other ones) from the motherboard, but the issue remains.
After that, I tried clearing the CMOS, which didn't remove the problem, I just had another sequence of QCodes instead, and the last QCode to be displayed was different (related to VGA).
Updating the BIOS to the latest version didn't help either, the time it takes for the system to turn off and restart seems to be always the same, and the last QCode to be displayed seems to be whatever is happening after that set amount of time.
I tried removing the GPU's, replugging the power cables, nothing seems to help.
I have another PC from which I could remove the PSU to test it in my non-starting PC, but I can't remove it currently as my wife uses it a lot.
Does anyone know what could be the problem or could give advices on something to try?
Thanks in advance !
Here are my system specs :
Motherboard model: Asus Rampage V Extreme
UEFI Version: BIOS 3301.
CPU: Intel Core i7-5930K (not overclocked)
Memory kit part number (s) and amount in GB: Corsair Vengeance LPX Series Low Profile 32 GB (4x 8 GB) DDR4 2666 MHz CL16
GPU: 2 x Gigabyte GV-N970G1 GAMING-4GD - GeForce GTX 970 4 GB (SLI)
SSD/HDDs/Optical drives: Samsung SSD 850 PRO 256 Go + 3 Western Digital Green 2GB HDD(have to confirm the 3 WD) + ASUS BW-16D1HT (Blu-ray writer)
Sound Card : ASUS Xonar DX
PSU: Corsair AX1200i 80PLUS Platinum
USB Devices (model/version number): Logitech G910 mechanical keyboard + Madcatz R.A.T MMO mouse
Monitor: BenQ 32" LED - BL3201PT
CPU Cooler: Enermax ETS-T40-TB
PC CASE: Phanteks Enthoo Primo
Operating system: Windows 10 64Bit (Activated)
Any third Party temp/voltage software installed: No
System Overclocked : No