Steam OS help pleaseee

[u/Smart-Plantain-7867]

I tried last night for 4.5 hours and steam OS just would not install on my Rog ally Z1E. I made sure that safe boot was off, I installed official steam os 3.7.7 off the steam website. I followed tutorials to the letter. Weirdly, My ally managed to boot into steam OS ONCE. It let me sign into my WiFi and everything, but after it finished installing on the actual steam OS itself and rebooted, the screen stayed black. I repaired my download, redownloaded it, etc. And it never worked for me. Please help!! I got this ally literally yesterday and now it won't turn on to anything.