Transferred to a suitable brightness. 3) or: cold start. 4) or: check whether there are other key press, such as the infrared receiver head INT0 button next to it screwdown.

• 调到合适的亮度。3）或者：冷启动。4）或者：检查是否有其他按键按下，如红外接收头旁边的INT0按键是否压下。