美国采购需求：自动宠物除臭器、无线宠物除臭器、猫砂盆除臭器、狗狗训练器、可充电狗狗止吠器、伸缩狗绳

I'm reaching out regarding an issue with my automatic cat feeder. Despite being plugged in and having fresh backup batteries installed, the display screen is completely black and unresponsive. The unit is still under two years old, and I'm concerned about this malfunction. Could you please provide guidance on what might be causing this issue? Any troubleshooting steps or solutions you might suggest would be greatly appreciated. I want to resolve this as soon as possible, so any info you can share would be really helpful. Thanks!