I NEED HELP WITH UBUNTO which doesnt load

Hi I need help basically my I did something to my hard drive and now every time I start my computer it doesnt let me access ubunto or even go to the ubunto load up screen nor does it even go to the windows boot loader I think I deleted the windows boot loader as it made me format my har drive but I bought another hard drive but still it doesnt work please help me that’s all that comes up if I don’t press the f1 button or del button