Blinking cursor on black screen at install

I have multiple OS’s booting off my SSD, i decided i needed more space for one of the OS’s so deleted an unused one and resized one of the others. However I wanted to move that one to KDE as well so decided to do a fresh install. Downloaded new copy of Manjaro KDE and DD to USB, as I have done many times before. However, when booting off USB I just get a blinking cursor top right of black screen. Have tried alternate USB with same results. Have also tried booting off USB into Boxes on my other OS which works fine. Any ideas / help welcome.