Essentially, a power cut happened to the building, and then a flashing amber light showed up on the back of the server's psu supplies, along with a constant beeping sound. All can be seen from the Picture attached-bearing in mind i logged on to the server and all seems ok and the UPS the server is plugged into is fine, so just wondered how i can solve this error.
Looks like you have multiple power supplies. I cannot tell from the picture if the right one is connected. In any event, you should be able to boot up and access hardware logs during the POST or from the BIOS screen.
Could very well be a bad power supply on the right.