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PC randomly doesn't boot after sleep + no POST (no BSOD)
Note: edited, because I just need help with the POST/sleep issue, not the BSOD.
I'm having a series of problems I'm just losing my head over.
1) First off, I never had a single stability problem while the PC is running, in fact it's quite new and I've been using it without any issues. However, as soon as I put it to sleep there will be a chance that it will simply not wake up next time, regardless of sleep duration, forcing me to turn it off and on again.
2) When this happens, it will take some random attempt at rebooting it because sometimes the POST will just not happen, and I've tried every combination of button press/USB unplugging/power cut. I don't know why power cycling/manually erasing the residual charge doesn't do the trick, but I might be doing it wrong.
After that, once it boots I get everything working as usual as if nothing has ever happened; the PSU voltages seem to be fine, the motherboard/GPU/CPU seem to work correctly, I can play games, watch videos, develop apps, fill 16 gb of RAM no problem...
What is this? A software issue? A hardware issue? The BIOS? A faulty Windows installation? I'm simply losing my head!
My specs are as following:
- Windows 7 Professional SP1 (I have some updates due)
- Corsair CX500M 500 Watt PSU
- Gigabyte 990FXA-UD3
- Zotac GeForce GTX 970
- AMD FX-8350 4.00 GHz
- Corsair Vengeance 16-GB kit RAM
- Cooler Master Hyper 212 EVO
- An old 300 GB Seagate ST1000DM003-1SB10C
- A newer 7200 RPM 1TB Seagate Barracuda ST3320418AS
- An old VGA Acer AL1512 15"
- A newer DVI Samsung S24B420BW 24"
- Various USB devices