My PC won't boot, and I can't enter BIOS? Then it magically fixes itself!?

malice7

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Oct 31, 2014
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There's been numerous questions on this matter but nothing like mine. So I'm sorry for the long post, but I'd be grateful for any reads because this has cost me several days of nervousness and headaches so far.

My problem is, every now and then (sometimes a few weeks, sometimes months), my 1-year-old PC makes a decision and refuses to load Windows. Normally, under the motherboard's logo appears a circle of dots, signaling that it's loading after a few seconds. Before that happens, I have the chance to enter BIOS. When this problem of mine occurs, the computer will refuse to enter BIOS despite having tried all the buttons. The normal beep and the fans starting up and all that still goes as normal.

(On a sidenote, if it's plugged, even my Xbox controller continues to flash constantly whereas normally it'd stop the flashing after the loading starts.)

This has happened to me several times already, every time costing me a couple of hours trying to fix it. I've tried simply leaving the PC unpowered for mins then trying again; unplugging and re-plugging the 24-pin connector; removing RAM sticks one by one; starting up with/without HDD/SSD; unplugging the USB devices. All failed. It responds to absolutely nothing. And that's when the funny part happens: after several hours of trying to breathe life into it again, all of a sudden it all goes back to normal. Then it works for an uncertain period of time again before dropping this on me again one morning, after generally turning off the PC the day before.

In several cases, I've read to remove the CMOS battery to see if that fixes the problem. I've never really had to go that far, 'cause by the time I could get there, it'd fix itself. Also, I'm rather a beginner at PC building and I fear removing my graphics card without which I can't access the battery.

Do you think it could be a possible faulty motherboard, or perhaps a faulty PSU? Or what on Earth is going on?

Thank you very much for any responses, all help is much appreciated.

My specs:
Motherboard: ASUS H97-PLUS
CPU + cooler: Intel Core i5-4690 (+ Cooler Master Hyper 212 EVO)
Graphics card: ASUS R9 290X DC II OC
Memory: 2x4GB Corsair Vengeance RAM (CMZ8GX3M2A1600C9B)
SSD: Samsung 840 EVO 250GB
HDD: WD Black 1TB
ODD: LG GH24NSB0
PSU: FSP Raider 650W
Case: Gigabyte GZ-X7
 
Well, I highly doubt its a board issue coming from ASUS. If the issue resolves itself but happens again, it might be a bad power supply. Im not too sure on how FSP makes their units, but I personally sleep better at night knowing I have a PSU from a reputable source like EVGA Enermax, Etc. I might need another's opinion on my prognosis. Just making sure, you state that sometimes your PC wont start up, and you can't enter the BIOS. Correct? Im starting with the power supply because all the other components in your system are from very reputable sources like Asus, Corsair, WD, LG, and Gigabyte. The FSP group is what stands out to me, but again, I need another's opinion.
 

malice7

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Oct 31, 2014
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I'm from Central Europe and FSP is a very reputable brand for making PSUs around here. The Raider series is not their high-end one though, but it is still a very reliable, quality product. It's an 80+ Bronze certification PSU (according to a review, and it's Silver according to their website), however probably not known worldwide, apparently. Although, I still have to admit that even the best brands and series have got to have a faulty product every now and then. Perhaps if I can borrow one from my friend one of these days, I'll give that a try.

Thanks for the suggestion.
 

malice7

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Oct 31, 2014
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I got my PC working shortly after I posted this. I didn't do much apart from trying to unplug the SSD, HDD and ODD but in the end it came back after I slightly adjusted the 24-pin connector. I feel like there must be something wrong with either that cable, or the PSU, or the connection from the motherboard's end, I dunno. It simply might have nothing to do with the 24-pin one.