Acer Liquid E700 (E39) not booting, system recovery does nothing?

Hi. Sometimes my phone will boot, but only to the logo, and nothing more. Other times, the only way I can get it to turn on is if I hold down power and volume down, and enter Android System Recovery. None of the options do anything, even after trying a factory reset and then rebooting it. What can I do? This happened after I tried installing an update, I pressed install and reboot, and it's been this way since. This is rooted btw, (Via Kingroot)

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