Hmm… no idea how it works tho…
but anyway, managed to get my replacement today. Hope it wont give me any trouble again… 
and Ive checked with them and apparently its the motherboard faulty that causes that Red light beeps.
So I think I can close my case. 
If anyone else ever encounter the same problem that I had, I believe it’s also the motherboard’s issue.
Cheers and Thanks all who gave their inputs!
Appreciate it a lot! 