píng mù méi yǒu xiǎn shì shí kě yǐ wèn gōng zuò rén yuán qǐng wèn zhè bān xiàn zài zài nǎ lǐ zhí jī

屏幕没有显示时，可以问工作人员：“请问这班现在在哪里值机？

When the screen doesn't show, you can ask the staff: 'Excuse me, where is this flight checking in now?'