HELP. Linkstar can't get into flash mode

I just got my Linkstar and it boots just fine into android OS. However I want to install ubuntu on it to run some other setup. For the life of me I can not get it into flash mode. I followed the instructions from here: But no matter what I do nothing happens. The picture shows to connect it without power, but nothing happens. I tried different USB-C cables, I tried two computers, and the same result, it just sits there. No power light nothing. Can someone help me out?