Asus laptop only booting to BIOS

My asus x550ln laptop suddenly only boots into BIOS. I've tried to resolve it and heres what happened. My laptop suddenly wouldn't boot to windows 10, it just showed a blank screen all the time. I eventually figured after a long time of googling that id probably have to repair my computer due to my main windows hard drive failing, since it often failed and gave bsod errors so I wasnt surprised. I installed ubuntu before so i went to my bios and changed the boot order and went to ubuntu to at least back up some files before wiping, i tried to force mount through terminal but the files app kept crashing, so i figured theres no chance. After that, i shut down the computer and when i turned it on again it wont boot to ubuntu neither, no matter what i do, holding shift to get to the hidden GRUB menu does nothing, changing boot order does nothing and boot overriding from bios also does nothing. After a while i didnt know what to do so i just randomly went to the advanced section in the bios and pressed 'start easy flash' there it took me to a new menu where i could browse my hardrives and i accesed my windows drive and everything was fine! I could acces everything in the whole drive, game folders, projects, everything was opening perfectly, which is strange considering it gave me obvious signs its just not working anymore. So, does that mean it could be a software problem and i can fix it somehow (please specify how if possible) or am i just getting my hopes up. Please help and thanks in advance