USB keyboard cause pc not to boot

[Teh_zackovitch]

I switched to the Corsair Strafe RGB Brown switches for about 5 months now and its been good since day one. However about 2 weeks ago I started to notice that my PC won't boot without turning the power supply off and on again. I think nothing of it and thought that it was the CMOS battery dying so I will replace it when I have the time. However before I can do that the PC refuse to turn on no matter what I do, though the odd thing is the Keyboard light will be on and even switching form different lighting mode (All red, rainbow,...). I disassembled the PC to clean and check all the connecting but still nothing happen. But then when I plug in my other Keyboard (a CM storm Rapid-i TKL with Blue switches) and the pc boot into BIOS but the operating system is messed - up. So far I still cannot made it boot with the Strafe plug in and I haven't reinstall the OS yet since my USB is in a friend house. IS there anything wrong with the PC or is the Keyboard the cause. Here is the PC specs:
Intel Core i7 4770k no overclock
Asus z87 Sabertooth
16GB of DDR3 1866 corsair Vengeance (2 stick)
2 GTX 780 DCU 2 form Asus
3TB WD Green
128GB Plextor m5
1000w Cooler Master V1000 power supply
AD Cooling dual tower CPU cooler
a generic Asus DVD drive
Phantek Enthoo Pro with a total of 8 fan of all sizes (6 of them through the build in fan controller, 2 connected to the motherboard with a splitter)

plug into the pc is:
A generic 4 port USB 2.0
Corsair Strafe RGB (later swtich to CMstorm Rapid-i)
2 Asus 1080p Monitor (1 through DVI, 1 through HDMI)
1 Crossover 21:9 1080p monitor through DVI
Logitech g502 mouse

I tried to be as detailed as i can, hope you guys can help me with this problem.

 

[TheMailonG]

Try booting with just the CPU, RAM, one monitor and OS disk, then put other main parts gradually back till you find the problem.

If it don't work...
Defrag disk and/or TRIM SSDs, run chkdsk /f and sfc /scannow, use Windows Repair Tools, test RAM and CPU with memtest86 and Prime95, check GPU and CPU temps, update BIOS, check your wall socket, airflow, well... The complete pack, it's really hard to find exactly what may be happening. Maybe the three first solve it, maybe any of them do it, but if you don't try you will never know.

Yes, it's barely the same I said here:
http://www.tomshardware.com/answers/id-3051017/splitsecond-full-system-freeze.html

 

[Teh_zackovitch]

OK I swear to god that I am going insane or the Keyboard is messing with me. All I did is re-install windows 10 and so far its working flawlessly. There are no need to turn off and on the Power Supply to boot the PC anymore and the Keyboard stop freaking out when the pc is off. I still need to monitor it's behavior for a bit but this is the weirdest thing I ever experience.

 

[TheMailonG]

Great it was that easy, it usually isn't. Actually it's a common problem, some PCs won't boot on certain circumstances, tends to be related with BIOS setup:

Spoiler

Power states:
Global states:

The ACPI specification defines the following four global "Gx" states and six sleep "Sx" states for an ACPI-compliant computer-system:[23][24]

G0 (S0), Working: "Awaymode" is a subset of S0, where monitor is off but background tasks are running.
G1, Sleeping: Divided into four states, S1 through S4:
S1, Power on Suspend (POS): Processor caches are flushed, and the CPU(s) stops executing instructions. The power to the CPU(s) and RAM is maintained. Devices that do not indicate they must remain on may be powered off.
S2: CPU powered off. Dirty cache is flushed to RAM.
S3, commonly referred to as Standby, Sleep, or Suspend to RAM (STR): RAM remains powered.
S4, Hibernation or Suspend to Disk: All content of the main memory is saved to non-volatile memory such as a hard drive, and the system is powered down.
G2 (S5), Soft Off: G2/S5 is almost the same as G3 Mechanical Off, except that the power supply unit (PSU) still supplies power, at a minimum, to the power button to allow return to S0. A full reboot is required. No previous content is retained. Other components may remain powered so the computer can "wake" on input from the keyboard, clock, modem, LAN, or USB device.
G3, Mechanical Off: The computer's power has been totally removed via a mechanical switch (as on the rear of a PSU). The power cord can be removed and the system is safe for disassembly (typically, only the real-time clock continues to run using its own small battery).

The specification also defines a Legacy state: the state on an operating system which does not support ACPI. In this state, the hardware and power are not managed via ACPI, effectively disabling ACPI.

Device states:

The device states D0–D3 are device dependent:

D0 or Fully On is the operating state.
D1 and D2 are intermediate power-states whose definition varies by device.
D3: The D3 state is further divided into D3 Hot (has aux power), and D3 Cold (no power provided):
Hot: A device can assert power management requests to transition to higher power states.
Cold or Off has the device powered off and unresponsive to its bus.

Processor states:

The CPU power states C0–C3 are defined as follows:

C0 is the operating state.
C1 (often known as Halt) is a state where the processor is not executing instructions, but can return to an executing state essentially instantaneously. All ACPI-conformant processors must support this power state. Some processors, such as the Pentium 4, also support an Enhanced C1 state (C1E or Enhanced Halt State) for lower power consumption.[25]
C2 (often known as Stop-Clock) is a state where the processor maintains all software-visible state, but may take longer to wake up. This processor state is optional.
C3 (often known as Sleep) is a state where the processor does not need to keep its cache coherent, but maintains other state. Some processors have variations on the C3 state (Deep Sleep, Deeper Sleep, etc.) that differ in how long it takes to wake the processor. This processor state is optional.
Additional states are defined by manufacturers for some processors. For example, Intel's Haswell platform has states up to C10, where it distinguishes core states and package states.[26]

Performance states:

While a device or processor operates (D0 and C0, respectively), it can be in one of several power-performance states. These states are implementation-dependent. Though, P0 is always the highest-performance state; with P1 to Pn being successively lower-performance states, up to an implementation-specific limit of n no greater than 16.[27]

P-states have become known as SpeedStep in Intel processors, as PowerNow! or Cool'n'Quiet in AMD processors, and as PowerSaver in VIA processors.

P0 max power and frequency
P1 less than P0, voltage and frequency scaled
P2 less than P1, voltage and frequency scaled
...
Pn less than P(n-1), voltage and frequency scaled.

https://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface

 

[Teh_zackovitch]

Dear TheMailonG
Ok after 2 days of working fine the same stuff happened again, but his time the computer won't boot at all!!! after I hit the power button nothing happen until I unplug the Keyboard (the RGB one) then the pc boot into the Bios and I can boot into windows after that. I read your post about the ACPI and I don't really understand it. Is there anyway to solve it?
Thanks in advance.

 

[TheMailonG]

I don't think the problem is your keyboard. However... Try connectiong your keyboard in other usb slot. Ex: You usually plug it on the back of the case, so plug it on the front panel. Run antivirus full-scan, set msconfig to start only windows processes and any programs in start up. Run chkdsk /f.

Really
Really
Gd luck 😀

 

[Teh_zackovitch]

OK after extended testing, here is the update. the Pc turn on and off as usual for the first week and the same thing happen again but this time its turn on when i unplug the keyboard, than I can just plug in the keyboard after that, the PC work just fine when its on and I have no problem Restart the PC. About a week ago thing got a bit worst. the PC only turn on when I unplug the keyboard and turn on and off the power supply rapidly (sometime multiple time), but than the PC work just fine. I tried with the other keyboard and I only need to turn on and off the power supply and it boot.
I think nothing of it but than thing got event worst, I can't play my game in SLI. first the games got artifacts all over but I was able to fix it by slightly adjust the SLI bridge. But than whenever I play game in SLI mode the game will freezes, the audio will continue to play but the game will freeze (though I can still close it with Task Manager but no Crash report). I tried reinstalled the driver and swapping the SLI bridge placement and its play games find until I either shut down or restart the PC. Please help.