The box would crash when running Android or CE. When it crash, the TV screen would just suddenly show that white noise thing and the speaker make those loud buzzing sound. Then the only way is to turn off the power supply.
I found the Power off features. Just need to long press the Power button on the remote for Shut down option. Interestingly when I shut down with android, it doesn’t turn back on itself. But when I am in CE and shut down from CE, it will turn itself back on again after a few seconds
Update: Previously I cannot even install games on the box. After flashing the new firmware I can install game but the moment I start the game, it would crash showing the white noise thing on the screen