Chromebook Refuses to Fully Poweroff

I installed the Mrchromebox firmware onto a dell inspiron 3181. Before I even installed an operating system, I noticed an issue when trying to poweroff. Namely, that it refused to do so. The screen would turn grey whenever I attempted to turn the machine off. The screen itself does not seem willing to turn off no matter how long I hold the power button, though it is evident that the machine will shutdown in every other respect. This is not a problem when I put the computer to sleep (I did eventually install Zorin OS) as the screen will completly turn off. The only remediation I have found so far is disconnecting the battery.