My cousin had a Chromebook that he didn’t use, and he saw that I needed one so he gave it to me. I used it and it was amazing. But then one day, I was watching YouTube and saw that my battery was low, so I plugged it in. A while later I saw that it was at 100% so I unplugged it and as soon as i unplug it, it goes to the “Chrome OS is missing or is damaged. Please insert a recovery USB stick or SD card.” I’ve done holding esc and f3 then clicking CTRL + D and that gets me to the os verification off thing. Then when it is supposed to go into a recovery mode, it beeps at me twice and then takes me back to the error screen. Please help me fix this because my school starts soon and I need a working chromebook now. I have the C740 Series.