Even when the power is on screen is black. Won't turn on

I had recently dropped my Huawei Valiant in the sink. But I put it in rice for 2 days and it was working perfectly. But in the middle of using it the screen just went black. I took out the battery and put it back in, turned it on, screen wouldn't turn on, but the phone would. Can I fix this or do I need to buy a new phone?