No signal after following steps...

Jun 30, 2018
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Hi I have finally put together my new computer and I just slotted the RAM in, however it’s being pretty tempremental because I have reseated and reconnected the connectors from the motherboard numerous times, I know my monitor is tempremental and itself does sometimes like to flicker. However I have managed to get a signal but my computer only ever boots into BIOS (I am using my existing HDD from an old build with windows installed already) which I found strange. Everything is clipped in correctly however I just can’t seem to get past BIOS or manage to keep a constant signal to my monitor. I forgot to mention also, when I save and exit from the BIOS the screen will go black and it won’t pick up a signal again...

Specs ;

Processor: Intel i5 8600k (stock)
Motherboard: ASUS H310M-K
HDD : 500GB WD BLUE (not sure of model number)
GPU: Zotac GTX 1050ti 4gb
RAM: HyperX Fury DDR4 8GB