Having just ordered and installed a new mobo (M5A99X Evo) and CPU (Phenom II), it ran perfectly, the first time I switched it on - no BIOS issues etc, just straight into Windows. Though as of last night, when I powered it up, the CPU light on the mobo came on, and it wouldn't even get to the BIOS - and it just idle'd.
After powering everything down, and powering it up, it then ran fine - booted upto Windows etc, no signs of any issue - but as soon as I shut it down, it won't boot up. After further investigation, I can reboot fine - but sleep will produce CPU light/idle'ing issue.
This pattern has continued, even after stripping everything down, including re-seating the CPU. My thinking is, that if I can boot into Windows, and utilize everything perfectly, then the mobo CPU light is a red-herring. Though should I consider anything else before I RMA the mobo? Any way to verify it's the mobo and nothing else?
Key Specs:
AMD Phenom II X6 Black Edition 1090T 3.2GHz
Asus M5A99X Evo
G-Skill 8GB (2x4GB) DDR3 1600Mhz
850W BeQuiet Modular BN075 PSU
Additionally, I am powering the mobo from both the 24-pin and 8-pin ATX power connectors, and only using a single graphics card (Radeon HD 6800), so I'd like to think my existing 850W PSU is more than enough here.
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