Ok so i finally found the cause of these images not loading and thought i better post for the devs (as it appears to be a bug) and incase anyone else has the same issue. Honestly if i had known this last time id have saved myself 6-7 hours of messing about.
So as mentioned in this post I had transferred my PC from my desktop monitor to my arcade cabinet. My desk monitor being a 30" Dell Ultrasharp at 2560x1600 resolution and my arcade unit screen being a Nec V321 32" 1360x768 native resolution. What would happen is when loading big box none of the graphics eg clear logos, banners and other things would load and it would also slow down the performance of the emulator, often you just have a black screen (unless text view) with the sounds of of the videos. If you could navigate (which was based off the sounds of the videos) you could get to the game and it would run perfectly, until of course you returned to big box, which had become more like "black box" !!
So what was the issue ? Well a few days ago after wiping my original PC and transferring launchbox to a new Windows 10 fresh PC and it doing a similar thing (not exact issue again) when i came to install it in the arcade, my brother said to me "you dont think that monitor is too low resolution for bigbox do you ? maybe the graphics are too large to load at that size" I thought it was highly unlikley but decided to change the resolution anyway from 1360x768 to 1920x1080p and WHAT DO YOU KNOW ?!?!?!?!? it fixed the issue., the logos and everything loaded perfectly. What I really found strange is changing them back again to 1360x768 (its native resolution) still worked perfectly......Ive since restarted the PC and it appears to have fixed the issue now.
So for anyone who cannot be bothered reading all that and has similar symptons, my advice. Change the screen resolution to something else (pref higher) and change it back.
Hopefully the devs will look into this bug and fix it but I have to say im happy as larry as i really dont think i have the patience to repeat all the work for a third time !
Id like to thanks everyone on here who tried to help its a great community and the fast responses are really comforting knowing you have support from others.