The key panel has mismatched keys. Try pressing them to see if any of the keys are stuck. If it still doesn’t work, if it’s under warranty, go to the dealer for after-sales service. If it’s out of warranty, go to a repairman. Please repair the home appliances.

Generally, the buttons on TVs and computers are prone to this problem, so generally don’t press the buttons all the time, and don’t move them after adjusting them once.