Here you have some other troubleshooting steps to try:
- Even though you have replaced the memory, make sure it is running at the supported speed for the processor (1600MHz).
- If possible try another processor on the motherboard.
It is important to say that some motherboards show a red LED when the processor is not working so that depends on the motherboard design.
All troubleshooting steps you have done are very good so try the above and if you are still having problems, contact our support center:
I don't think it will be possible for me to get the memory running at the supported speed first hand as I don't have another computer to install it and detune it. However, my understanding is that this shouldn't be an issue for booting up but more so stability issues if I could ever get it to post. I'm also in a location where access to parts is by order online only so at this stage I feel like I've exhausted all my options.
I do appreciate the answer about the stand by LED but I'm completely perplexed as to why or even how I'd get two motherboards exhibiting the same problem. From most likely to least right now I'd say it's the processor, the mobo (again) or the PSU. The PSU is the wildcard because the rails were giving the correct voltage but unless there's something I'm overlooking I'm not sure how it'd be leading to a 00 code.
I'll give it a go with the online support later. Otherwise, thanks for the help.