Pc not posting AGAIN

Hardware Build a PC
1

Ok last night I had a big problem with my computer not posting or beeping, I fixed it by putting the jumper on the 2 correct pins and it went into BIOS fine from then. Today I come back ready to install windows 7, I bring my montior from downstairs into my room and plug it in, turn computer on...and 'no signal'...again.

My computer does a short beep when it turns on and everything seems fine, I'm guessing it's a really obvious mistake I have made and it's causing this problem but I don't know what it is, could you guys help me please?

I'm using a DVI - VGA adapter to my monitor.

2

it is a gigabyte z77, am I correct?

3

No it's MSI 970A-G46

4

ok, i'll check your bio, different manufactuers use different bios, and they all have different beep codes

5

Yesterday it beeped once on POST aswell and it worked fine 

6

yep, as I suspected, it's AMI bios

dram refresh failure

http://www.computerhope.com/beep.htm

7

The ram was working yesterday though 

8

well, it's not anymore..... I would just RMA the mobo and find somwhere to test the ram