no signal input or display :(

[Vibe]

So i recently replaced my gigabyte gaming 5 motherboard to the msi gaming 5 z97 in order to fix the reboot loop i was having with the gigabyte board. Installed the msi board today and everything seems to be running fine however i just have blackscreen no bios no operating system nothing. It did boot up once the operating system but has never happened again. Tested the following steps
Reseated ram/gpu/cpu
unplugged all psu wires replugged and tidyed them up
reset bios/cmos
checked behind motherboard tray for anything that could cause shortages
tested with a secondary power supply still no joy
changed the cpu cable
took entire motherboard out cpu everything and redone again
Tried pretty much everything the pc still does the reboot loop with the new board but only 1 time then starts up but displays nothing but stays running. If anyone could help i would really appreciate it thanks in advance

 

[Vibe]

Also tried with gpu taken out and using onboard still nothing . no bios screen or anything just blackscreen consistently but all fans including gpu fans running fine.

 

[Vibe]

I also found the only way to get the bios screen up is to move the ram from 1 slot to next and so on. It booted windows once fine last night however now just back to starting reboot 1 time then sticking on a blackscreen and the monitor displaying no display/signal input. if anyone could help it would be much appreciated