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[Troubleshooting] My computer won't boot! Tried everything I can think of. Is my mobo dead, or am I stupid? Please help!

System:

Mobo: Gigabyte Z97 UD3H-BK
CPU: i5 4690K
GPU: Gigabyte GTX 970 G1 Gaming
PSU: EVGA Supernova G2 800w
RAM: 2x8 GB Crucial Ballistix Tactical
Storage: 2x 250GB Crucial SSD, 1x Seagate 3TB
Monitor: Seiki SE39UY04

Watercooling:

EKWB D5 Pump
Magicool 360mm Slim G2 Radiator
EKWB Supremacy Evo
EKWB GTX970 GPU cover + backplate
FrozenQ Reaction 250mm Res
Custom sleeved mobo, GPU, and mobo ATX12v cables.

Just built my first watercooling loop. Loop runs fantastically. However... computer will NOT boot, or even post into BIOS... It definitely used to do this, without any error. I've tried everything I can think of. I don't get any beeps, or any indication that things are broken. My debug LED goes through the normal digits, and then waits for a second at what I can only presume to be A9, and then stops on what I believe is A6.

I'm viewing it from the right angle, otherwise the readout would be illegible. It's possible that it halts on "Ab" to be honest, but I can't seem to find a real conclusion to it. I've looked at this link and people seem to have the same problem (http://forum.giga-byte.co.uk/index.php?topic=9026.0).

I also had turned my PSU on/off multiple times during my build phase because I was shorting it with the included mobo shorting attachment, so I could test the LED strips I placed in the machine. I also accidentally connected a fan to the CMOS jumper during boot once, but I don't think that would have affected anything.

I've done these troubleshooting steps (and attempted a reboot after each trial):

- Disconnected all components, examined all sockets for bent prongs, reconnected, including PSU side of connections
- Disconnected all watercooling parts
- Detached GPU and started using the mobo HDMI port
- Checked HDMI cable and TV with other computer
- Detached all SATA connections
- Removed RAM, then added 1x RAM back
- Examined all prongs on the board for connections bent ports
- Removed all fans from the fan controller, and made sure only the CPU_FAN -> Fan Hub is connected
- Kept the TV unplugged during quick boot, then plugged it back in after it finished it's cycle
- Moved the TV to another room and tried with another desktop
- Reset the CMOS via the jumper and the CMOS switch
- Unplugged the TV, booted till "Ab/A6", reconnected monitor to iGPU

Things I have not done:

- Removed CPU waterblock and inspected for bent prongs (not sure if this is necessary)


I'm [watch your language] going nuts over here, because I really need my PC back, and I haven't had it for over two weeks (parts came in slowly, and I had to learn/build).

Is my mobo dead? Any help is much appreciated. Thanks!

http://imgur.com/qfNYo1l
5 answers Last reply Best Answer
More about troubleshooting computer boot mobo dead stupid
  1. rgd1101 said:


    I don't have anything attached right now. I literally have 1 stick of RAM and my fans connected, with my HDMI to the onboard HDMI slot.
  2. MeatTowel said:
    rgd1101 said:


    I don't have anything attached right now. I literally have 1 stick of RAM and my fans connected, with my HDMI to the onboard HDMI slot.


    reset your bios. Were you try to setup a raid ssd?
  3. rgd1101 said:
    MeatTowel said:
    rgd1101 said:


    I don't have anything attached right now. I literally have 1 stick of RAM and my fans connected, with my HDMI to the onboard HDMI slot.


    reset you bios. Were you try to setup a raid ssd?


    Not sure how to reset my BIOS, other than pulling out the battery for 30 seconds. Is that what you mean? Or do you mean pressing the reset CMOS button?

    Nope, not trying to set up a raid SSD. Everything used to work, it's a basic setup. Now it doesn't, I didn't change anything besides adding a watercooling loop.
  4. Best answer
    well try this, sit your motherboard on top of the box it came in, put your stock cpu cooler on. put 1 stick of ram in, plug the motherboard 24 pin as well as the cpu 6 pin (make sure they are plugged into the psu correctly too if its modular). plug in the hdmi, and jump the power with a screwdriver and tell me what happens.
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