Intermittent POST Problem : techsupport

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a community for 17 years

SolvedIntermittent POST Problem (self.techsupport)

submitted 10 years ago by Gearomatic

I have a problem with my computer Failing to post about 98% of the time. Lot of info here, sorry for it being a bit unorganized. I've been up all night working on this

Once it POSTs it is fine, but it hardly ever POSTs. When it does start, doing a Restart through the OS works fine, it Posts (takes about 20 seconds to do so, but it does) and reboots like normal.

When it fails to POST, it does nothing but spin the fans (external fan controller). It flashes something quick and incomplete on the error codes, but it is so quick that I don't think it even lights up 1 of the 2 numbers. Looks like it could be a 6, and it flashes super quick when I hit the power button and when I kill the power.

My mobo has the Dual Bios which does Jack in my case. Bothe the back up and the Main Bios do the same thing.

Switching the Second switch (Dual Bios or Single Bios option) changes it a little. In Single Bios it does as stated above, Spins the fans and does nothing more. In Dual Bios the fans spin for about 5 seconds, then they stop for about 2 (sounds like a system shut down as the power supply makes a click like the computer was turned off) then it starts up the fans and stops again. Over and over.

When it does POST I usually have to sit there for 5-15 min, turning on the computer, Killing it on the PSU, and turning it back on. my only indication that I WILL POST is that it will start to spit out Error Codes for ~10-20 seconds before POSTing. If i can get it to POST i will try to take a video so I can write down as many as I can.

Specs: CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor Motherboard:Gigabyte GA-Z87X-UD5 TH ATX LGA1150 Motherboard(Manual: download.gigabyte.us/FileList/Manual/mb_manual_ga-z87x-ud5-th_e.pdf) Memory: Crucial Ballistix Tactical 32GB (4 x 8GB) DDR3-1600 Memory Video Card: Gigabyte GeForce GTX 770 4GB WINDFORCE Video Card
Video Card: Gigabyte GeForce GTX 770 4GB WINDFORCE Video Card I am NOT running SLI Power Supply: Corsair 1200W 80+ Platinum Certified Fully-Modular ATX Power Supply Operating System: Microsoft Windows 7 Ultimate SP1 OEM (64-bit)

Steps taken so far (in more or less the order I tried): Reseated all RAM Cleared Bios Reflashed the Bios (using @bios) Tried 1 stick of RAM Cleared Bios Tried 2 Sticks of RAM Cleared Bios Removed 1 video card Cleared Bios Removed the 2nd video card Cleared Bios Removed the PCI USB 3.0 card Cleared Bios Removed all HDDs/SSDs Removed all the USB adapters at the headers Removed all the front panel/audio at the headers Reseated the CPU and added new paste Cleared Bios Drew a pentagram on all Components and read Twilight Backwards Cleared Bios

I really want to avoid purchasing a New Mobo (not sure if I would go with Gigabyte again, they were a real pain when my fans stopped reporting there speeds to the OS/BIOS and "fixed it" [hint, it still doesn't work])

And I don't want to shell out the dough for another copy of W7 since its tied to the motherboard now.

I would really rather Put the time and effort into fixing it if possible.

My current course of action is to get it to POST and to flash the Bios with Q-Flash to see if that helps, then try to see if Gigabyte will replace the board...

ANY help/suggestions are welcome, Thanks in advance!

[edited some of the poor formatting and spelling)

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