So I just built my PC a little over a month ago and it's ran perfectly with no issues until today. Last night I did a little gaming and then let the PC go into sleep mode as usual. Before I go into more detail, my specs are:
Case: NZXT H440 Razer Edition
Mobo: Asus MAXIMUS IX HERO ATX LGA1151
Processor: Core i7-7700K 4.2GHz
Cooler: Corsair H100i v2
Ram: Corsair Vengance LPX 16GB DDR4-3000MHz
Gpu: Asus STRIX 1080 8GB
PSU: Corsair CXM 750W 80+ Bronze Semi-Mod
Storage: Samsung 850 EVO 250GB SSD x2, WD Blue 2TB HDD
So I have my mobo and gpu RGBs set up to just show temps. When my PC is in sleep mode, both usually show green. This morning, my GPU RGB was just flashing red (which is the default lighting) and that was odd. So I tried to wake my PC from sleep and nothing showed up on the monitor. I did a hard reset and my PC would not POST. No ASUS splash screen, no BIOS, nothing. Monitor would just go back into standby. Fans all running, mobo RGBs still worked as I had set them, GPU RGBs still pulsing red (default setting) and my Q code would actually show my temps momentarily before the PC would seem to go back into sleep mode.
I tried a CMOS reset, disco'd my GPU and no change. The PSU in there had a strange whine to it that started a couple weeks ago and after some research today, found it happened to a lot of people but I didn't see anything about that being a precursor to a PSU fail. I also started getting an A2 Q code "IDE Detect". I'm back at work right now so I can't mess with my PC at the moment but I'm kind of at a loss now. I'm not a PC guru and this was my first build. I did order a new PSU as I wanted a fully modular one and there is a chance this could fix it.
Any suggestions?
I've also read of an instance where the CMOS battery was changed and that was a fix as well as maybe a monitor cable issue (I use a displayport cable). Also I have seen possible SATA cables causing the problem. Just some things I have found searching but wanting to see if any of you have seen this.
I also just purchased a couple more SATA data cables so for now, I'll at least have those and a new PSU on hand.