Posted 20 December 2012 - 06:26 PM
Hello, I was referred here in order to try and get a problem resolved that I have had since I built my computer. I've taken it to several shops and after a lot of tinkering on their side and mine, we've hit a wall and are stumped. Firstly, I'll start by listing the essential components to my build so anyone who reads this will know exactly what I am working with.
Case - COOLER MASTER HAF X RC-942-KKN1 Black Steel/ Plastic ATX Full Tower Computer Case
PSU - COOLER MASTER Silent Pro Hybrid RS-850-SPHA-D3 850W Intel ATX 12V V2.3 & SSI EPS 12V V2.92 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Panel Power Supply with Fan Control
Motherboard - ASUS P8Z68-V PRO/GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS
CPU - Intel Core i7-3770K Ivy Bridge 3.5GHz (3.9GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I73770K
Video Card - EVGA GeForce GTX 680 2048MB GDDR5, DVI, DVI-D, HDMI, DisplayPort, 4-way SLI Ready Graphics Card Graphics Cards 02G-P4-2680-KR
Assembly and installation of all these components went smoothly. I had no errors and have had some prior experience with building computers in the past. However, upon start up it immediately shut itself down after only a few seconds. I reseated the RAM, tried different ports, and only used one stick at a time and still nothing. I removed the RAM entirely and the motherboard stayed on and gave me an error beep to let me know there was no RAM. If I put the RAM back in, it will shut itself off again. I assumed it was a bad batch of RAM, but upon replacement I had the same issue. Below I'll put a list of all the things that have been tried to hopefully narrow things down for a diagnosis.
1 - RAM was reseated, tried individually, and eventually replaced.
2 - RAM that was known to work prior to being put onto the motherboard was tried, also to no avail.
3 - CPU and CPU fan were reseated.
4 - All plugs were reseated.
5 - Multiple power supplies were used with the same result.
6 - Different power configurations were used on the supplemental CPU power port. 4, 6, 8, all to no avail. However, having no pins in the supplemental port allowed the computer to start and run continuously, but with no POST beep at all.
7 - The motherboard was inspected for shorts and blown capacitors.
8 - The motherboard itself was pulled out and the stand offs were checked for proper seating.
9 - Screws holding motherboard into the stand offs are not over tightened, nor are they too loose.
10- Motherboard battery was removed to reset it to factory default.
11- ASUS was called for technical support.
None of these solutions have made a difference, the computer will start and then shut itself off seconds later without fail on every boot regardless of what we've tried. I believe I've exhausted my knowledge of troubleshooting hardware and may have to replace my motherboard and hope for the best. If anyone has any other ideas to try, please feel free to post here. I will respond in as timely of a manner as I can, and when a solution is found I will post it here in case someone else is having the same issue.