SOLVED! --- Help! No BIOS, no Boot (Motherboard Error -- A2 Code)

I don't think it is the SATA cable either and agree that that will need straightening. I will say that this was my very first thought that this was my problem because the other end of that cable had broken. It was a 90° angle plug and had broken. I still had new spares and replaced it as it was. I'll use a different socket because it bends at a funny angle through that gap.

I'll buy a new CMOS battery as well, just because.

Having said all that, is there anything else left to try?
 
I don't think it is the SATA cable either and agree that that will need straightening. I will say that this was my very first thought that this was my problem because the other end of that cable had broken. It was a 90° angle plug and had broken. I still had new spares and replaced it as it was. I'll use a different socket because it bends at a funny angle through that gap.

I'll buy a new CMOS battery as well, just because.

Having said all that, is there anything else left to try?

Yes, replace the CMOS battery because you are getting an NVRAM error - when you get a new one go through the full reset procedure above.

Then test things one at a time (with a minimum of CPU, 1 stick of RAM, GPU, CPU fan and power; plus a keyboard and monitor).
 
On that page of the manual on your link, the LED is the bottom one, "BOOT_DEVICE_LED" -- bright orange, (then skip to the next page and also "PWR_LED" bright red).

I've spoken to Overclockers (who I originally purchased it from) and I'm trying to get them to do an out-of-warranty repair for me (obviously I'm happy to pay for it) as I don't fancy buying other CPU's, GPU's or getting a new Motherboard without testing (or knowing what's up) and wasting my time or making things worse.

I've never flashed my BIOS before, not overly confident, but maybe I'll find a tutorial somewhere and try that as well.

It's all very odd as it has been working at 100% for five years and no real reason for it to conk out like this all of a sudden.
 
Some problems with PC's can mean trying with other parts until you find the fault, which not everyone has the means to do.
Some faults are obvious and straight forward.
As you don't have parts to swap for testing there is no reason for not seeking assistance from Overclockers to diagnose your problem.

Good luck and I hope it turns out to be something simple and inexpensive ;)

Please pop back later and let us all know
 
UPDATE! (And good news!)

Desperate, I took the shell of my PC to my local PC repair shop (If the PC needed new GPU's or CPU's, I didn't have any to test with, and I'm not comfortable with handling CPU's anyway, so I figured let the shop do it), anyway, they had it on their bench and they ended up reflashing the BIOS (he talked about re-merging it and updating it) and now it boots fine every time!

So thank you, everyone, for your help with this, it's been brilliant and I've learned a lot.

Hopefully, someone in the future with this problem can skip to the end and try re-flashing the BIOS first to save time!

CG
 
Congrats, Glad that you are back up and running.
And as I had mentioned flashing the bios I'm taking it at a personal win and patting myself on the back for a job well done ;)
 
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